Navien Tankless Cleaning Water Heaters Now

Поделиться
HTML-код
  • Опубликовано: 2 дек 2018
  • Descale your Navien Tankless hot water heater with this yearly maintenance procedure. Ray from Water heaters now will walk you through the steps to keep your water heater providing hot water in your home for many years.
    For more information, check out some of our blog posts on tankless units:
    www.waterheatersnow.com/blog/...

Комментарии • 771

  • @brettbarker9394
    @brettbarker9394 3 года назад +294

    I'm a licensed plumber in Canada, and I just have to say I have so much respect for this person. An honest plumber is hard to find nowadays, and to find one willing to help instead of gouging the customer. That's a game changer. Keep on doing what you're doing, you're doing the world a much needed service and keeping the scummy plumbers away at the same time. :)

    • @benjaminvalencia4228
      @benjaminvalencia4228 2 года назад

      I can't find a Sump Pump that takes Clothes Washer hoses, do you know of any?

    • @tonynguyen5362
      @tonynguyen5362 2 года назад +2

      @@benjaminvalencia4228 I used this sump pump to clean my Navien 240A from HD, 1/4 HP Submersible Thermoplastic Oil-Free Utility Pump
      by Superior Pump Model #91014

    • @seanh2390
      @seanh2390 2 года назад

      @@benjaminvalencia4228 Harbour Freight sells the pumps in the US; Princess Auto (and likely Canadian Tire) sells them in Canada. Just search for a 'submersible utility pump" and make sure it has a garden hose adapter at the top.

    • @calimilk1113
      @calimilk1113 2 года назад

      Yes , totally agree, nowadays most are like car mechanics

    • @hollywood21639
      @hollywood21639 2 года назад +2

      @@benjaminvalencia4228 clothes washer hoses are the same thread as garden hose. FYI

  • @georgescott4550
    @georgescott4550 4 года назад +60

    Clear and to the point with excellent camera work and audio. Whoever put this together ought to be teaching other people how to make instructional videos.

    • @unindoji
      @unindoji 3 месяца назад +1

      Amen to that

  • @camillecosta530
    @camillecosta530 3 года назад +43

    I did it! I did it, I did it! Watched your video about 50 times and was able to flush my tank and not blow up the house or break anything! Feeling so smart and accomplished and $200 richer! Thank you so much!❤️❤️❤️❤️❤️

    • @leahespeleta5734
      @leahespeleta5734 Год назад +3

      Me too me too I watch this video o God knows and finally master it so happy happy widow my late husband is so proud of me right now ❤️. Last week my navien leaks called plumber $110.00 service fee right away parts is $47.00. Check Amazon parts was $34.00 now I know how to change it plumber won't be coming to my house thank you for this guy Ray.

    • @erniecollazo3849
      @erniecollazo3849 2 месяца назад

      😂

    • @erniecollazo3849
      @erniecollazo3849 2 месяца назад

      😂

    • @bluwng
      @bluwng 7 дней назад

      Same except the second year I flushed it backwards, didn’t hurt the system but it did flush more junk, I suppose it was hidden debris that would not release if flushed the standard way.

  • @shaneadventures677
    @shaneadventures677 Год назад +8

    One of the best 11min spent in my life seriously..

  • @unindoji
    @unindoji 3 месяца назад +7

    Given that this video is 5 years old...speaks volumes....
    I couldn't just give a thumbs up and walk away. I gave a thumbs up to another video Ray did on servicing the Navien....but it wouldn't allow for comments, so I thought I'd just comment on this video since its essentially about the same topic. Ray - your videos are absolutely game changers. You explain things so well, I feel like I'm working for Water Heaters doing OTJT!
    Everything you covered was so thorough, it saved me quit a bit in service fees. If you guys were local in town to the Houston area, you'd be my plumbing company of choice, hands down. Thank You for a great PhD in tankless water heater maintenance!

  • @rtaj80
    @rtaj80 10 месяцев назад +22

    We just used your videos to clean my Navien for the first time. I was intimidated, but we got it done. Thank you for providing such clear and directive instructions in your videos, and for saving me almost $500!

  • @WayneBaillie-in4ko
    @WayneBaillie-in4ko 8 месяцев назад +39

    This was an exact replacement for the old one that lasted about 10 years. ruclips.net/user/postUgkx7yWIKcrbA9KMHkGSfcgxW2lsjHT6B8Sh The top of my mitigation tube by my roofline was just a 90 elbow which allowed too much debris to fall down into the fan, eventually ruining it. Without this issue, I bet it would have kept running another 10 years. When I replaced this fan, I added an extra elbow joint so the top tube now it does a 180, which should solve that problem. The radon guys around here wanted to charge me a $300 diagnostic fee, then parts/labor (probably close to $600 total). I installed this all by myself in about an hour for the cost of the fan; it would probably be even easier/faster with two people. FYI the manufacturer's warranty greatly differs depending on whether you install it yourself (1 yr warranty) or have a licensed installer do it (10 yrs).

  • @bradcard423
    @bradcard423 Год назад +4

    I watch this every year as a refresher just before I do this to my Navien °T-CREATOR dual unit.

  • @elizabethwatt8131
    @elizabethwatt8131 3 года назад +50

    This gentleman has provided a fantastic ‘how-to’ video. Every step is performed perfectly in order. There are other videos out there, but this is the best. Take notes or watch this video on your iPad and do as he does, pausing the video as needed. You can’t go wrong. Each step is explained at the proper time in the proper sequence. No cover is replaced or power switch turned on, until it’s time.
    It is my favourite ‘how-to’ for flushing my Navien water-heater.

  • @ellenfarrell9763
    @ellenfarrell9763 3 года назад +5

    You are the BEST!!! I wish I had had your company install my heat and hot water system. The company I used has ripped me off royally. Thanks to your video, I just got my heat and hot water running by myself in the middle of winter on a holiday weekend. The company said they couldn't come until tomorrow with temperatures going down to the teens overnight. I just saved over $600 dollars! It is SO nice to see a company that cares about their costumers and don't rip them off! It is so rare these days.

  • @JimVence
    @JimVence 7 месяцев назад +4

    I've self-serviced my Navien these past four years, based on this well-done explanation of the maintenance procedure. Thanks!

  • @nmutz8165
    @nmutz8165 Год назад +20

    Did my first flush today and am so grateful I had this video. Thank you for making such a high quality, detailed video. Fantastic job!

  • @chrisdonze3097
    @chrisdonze3097 Год назад +3

    The instructions made it seem so much harder than how this guy explains it. Thank you so much for taking the time to do this instructional video!!!

  • @marylyons4612
    @marylyons4612 Год назад +3

    This video makes me believe I can do this. Very clear, to the point. Thank you for having someone else film it so that I can easily see what you're doing.

  • @calebmckissick2914
    @calebmckissick2914 4 года назад +162

    Best tankless service video I've seen on the web, HANDS DOWN, and I'm a licensed plumber. Nice work!

  • @michellehoyt603
    @michellehoyt603 3 года назад +48

    You have explained this so thoroughly. This was extremely easy to accomplish for this stay at home mom on a budget!! Thank you!!

  • @void__star
    @void__star 2 года назад +3

    I've read over the Navien instructions many times, and I swear it doesn't mention cleaning out that dirt trap. I didn't even know what it was.
    Well, I did as you showed and wow, it birthed a nasty puddle of dirt and water into my bucket. Thank you for bringing this to my attention.

  • @TheLegendaryphenom
    @TheLegendaryphenom 5 лет назад

    Thank you for the video. I just did my Navien according to your instruction. Mine is a little different, but similar enough.

  • @dougtapper7759
    @dougtapper7759 6 месяцев назад +3

    Thanks so much Ray. This is my second year flushing my Navies heater following your instructions. I appreciate the DIY video, saving me the price of a service call for something I could easily do myself.

  • @vstar7196
    @vstar7196 10 месяцев назад +3

    One of the best “how to” videos I’ve seen. And highly commendable that this company is straight up and honest. Too cool!

  • @infotruckbobcat9892
    @infotruckbobcat9892 5 лет назад

    Have one of these in the house we bought last year. Very helpful video! Thank you!!

  • @joonchung7078
    @joonchung7078 2 года назад +2

    I just finished heater flushing by your instruction. I saved $200+ because of you. Thank you.

  • @The_Drei
    @The_Drei 6 месяцев назад +3

    Thank you Ray for the detailed instructions. It was easy to follow. The first time it was intimidating but this second time this year it was much easier.

  • @dh1877
    @dh1877 4 года назад

    Greatly appreciated, thank you for the hands-on detailed instructional video on how to maintain our Navien Tankless Water heaters!!!!

  • @cordevfox
    @cordevfox Год назад +6

    You are awesome to do this for your customers and you saved the day for me when my Navien just stopped sending hot water - your steps got it back and running again!! Thank you!!

  • @16bpotter
    @16bpotter 4 года назад +1

    You can't get any better than this video. Thank you!!

  • @R1Armadill0
    @R1Armadill0 2 года назад +18

    Performing my first flush. This video was immensely helpful. Maybe it's been updated, but I found I did NOT have to unscrew the vent pipe to get the top filter out. Just the screw holding it in, and it popped right out! Good Stuff!

    • @Hall7180
      @Hall7180 Год назад +1

      Same with my unit, no top screw for cold air inlet filter. One less step 😄.

  • @davejalenderki
    @davejalenderki 4 года назад +2

    Thank you for taking the time to make this video. It shows that you really care about your customers. That is a rare quality these days.

  • @kevinperry5672
    @kevinperry5672 2 года назад +9

    I just purchased a Navien Tankless hot water heater today and was a little nervous about having to descale it on my own, but this step-by-step video is awesome! I've already entered the date on the heater when it was installed and when it's due for maintenance one-year from now. Thanks so much for this video!

  • @twhite4452
    @twhite4452 3 года назад

    Just finished descaling my Navian heater with this video. Awesome job! Dead on. Every detail!

  • @Kelekona_808
    @Kelekona_808 Год назад +4

    Thank you for this video! I'm about to have one of these Navien 240S units installed and it is great to know that there is a simple and complete guide I can refer to for regular maintenance of the unit. Your guide has given me the confidence to do the maintenance on a unit that hasn't even been installed yet.

  • @NaomiM-ck6yb
    @NaomiM-ck6yb 2 года назад +3

    So thankful for this How-to video. I was promised an initial flush from the Navien retailer I purchased from, only to get a verbal How-to, when he was doing something else. For someone who has never done this before, a verbal talk through is certainly not sufficient for me. I wish all company's held your standards! You made cleaning my water heater successful and easy. Thank you!!!

  • @Palp83
    @Palp83 2 года назад

    Very Patient and to the point video. Not second is wasted and thoroughly explains even for the beginners. Thank you.

  • @ralphgillis6457
    @ralphgillis6457 4 года назад

    Great video, thank you!!!! My installer never mentioned maintenance, and I never thought of doing any! Only when this happened to come up in my RUclips suggested videos did it dawn on me - three years in and the air filter was nearly clogged with leaves. I will do it yearly here on out thanks!!!!

  • @FedsBoy
    @FedsBoy 4 года назад +3

    I wish all DIY videos were as good and professional as this! Thanks for this!

  • @twistingterrain7748
    @twistingterrain7748 4 года назад +1

    Thank you for the video! Just installed the 240S in my house.

  • @javier2surf
    @javier2surf 4 года назад +3

    Clearest and best service video I've seen on a tankless water heater. Just saved 300 bucks!!!

    • @LittleTut
      @LittleTut 4 года назад

      True! Had my tankless unit going on two years (house remodel) and this morning got error E016, which I Googled and found filter needs cleaning and heat exchanger. I did unplugged for 30 min and plugged back in and unit working good. But I see I will need to service, MY SELF! :) Save me some mula! :)

  • @danlubbs5723
    @danlubbs5723 4 года назад

    Excellent video. It showed exactly how to clean the Navient water heater, where the filters, screws, valves are. Thanks

  • @rickygreer498
    @rickygreer498 3 года назад +15

    I think this is the best video for" how to '" on youtube period. I'm a retired General Contractor and do all my own work with the help of youtube, so I watch plenty of videos. Thank you !

  • @156chanty
    @156chanty 7 месяцев назад +3

    I never leave comments but THIS video and this guy deserves it! Thank you so much! This is the most clear video I could find on the subject and I watched quite a few before I found yours! (I found the one from last year first and then this one). Thank you for being so helpful and so thorough!

  • @johndonnelly5971
    @johndonnelly5971 5 лет назад +1

    Excellent clear video since I just got a new Navien combi boiler, thanks.

  • @yurihuta8487
    @yurihuta8487 Год назад +1

    Using this video for a few years now... Thank you for keeping it up. It continues to help.

  • @jackchen5882
    @jackchen5882 2 года назад

    Thank you so much for the step by step instructions. Looking forward to my first Navien cleaning!!

  • @bobcalabrese9020
    @bobcalabrese9020 3 года назад

    Thanks for the great video! My Navien is 2 years old so this is my 2nd cleaning. The video I watched last year did not mention the Cold Water Filter nor the Dirt Trap so thanks very much for pointing those out. My 45-minute timer is running so I'm almost good for another year. Thanks again!

  • @glennbrown9178
    @glennbrown9178 4 года назад +2

    Very well done! I've been doing our Navian for 8 years now since we moved in. Home stewardship.

  • @genepapaleo9284
    @genepapaleo9284 4 года назад

    By far the best video of tankless water heater cleaning i have seen.

  • @keithjackson5321
    @keithjackson5321 3 года назад +1

    Very informative and easy to follow direction. Thanks for posting! Hands down the best "how to" water heater maintenance video I found.

  • @cullinan18
    @cullinan18 4 года назад

    great video. i just did the de-scaling with my 8.5 year old and he was able to help with a bunch of the steps.

  • @Uvbnaxed
    @Uvbnaxed 2 года назад

    Seriously, I can’t thank you enough. Made my life so much easier, and best of all we have hot water!

  • @Dlwinborne
    @Dlwinborne Год назад +3

    Ray, THANK YOU for this easy to follow instructional video. I purchased a flush kit, complete with descaling solution, hoses and sump pump. It was very easy to do, following your video and I have placed a reminder in my calendar for next year to repeat the process. I called a plumber who wanted $475 to do what cost me $140 to purchase the kit. Peace and blessing to you!

  • @frankvanderstaay7564
    @frankvanderstaay7564 2 месяца назад

    This is a great video - thanks! I haven't serviced my unit in 5 years but now know what to do. Very clear and concise instructions!

  • @phairlyoddparent3972
    @phairlyoddparent3972 3 года назад +3

    I just got two Navien water heaters installed and this is exactly what I needed! I’ve seen some other videos on the subject, but none as detailed as yours with showing the various filters and traps. Thanks a bunch! 👏🏼 👏🏼 👏🏼

  • @JamesJ7851
    @JamesJ7851 5 лет назад +11

    Great reminder and instructional, I perform this service every year on my unit.

  • @zHumanfactor
    @zHumanfactor 5 лет назад +2

    Fantastic video. Very helpful and a great expense saver. Ray, you should have your own home improvement show! :)

  • @terrybergdolt3106
    @terrybergdolt3106 4 года назад +4

    This is an amazing, helpful video . You made me feel confident to even start this job, and made me feel good that I could do it. Great job !!!!

  • @martyfaust1099
    @martyfaust1099 5 лет назад +4

    Best review yet. Clearly spoken and understandable. I got caught last year on the dirt trap because the O ring slipped off and left me in a lurch...no info on it. But now, yes Sir! Great job.. and tanks or thanks!

  • @brianseadoo8307
    @brianseadoo8307 5 лет назад +1

    Thanks for the help , you explained so clearly,that it went without a hitch..

  • @peteschardien3115
    @peteschardien3115 2 года назад +8

    Great video. I never knew I needed to do this until today. I have (2) Navien tankless heaters in the house & they’ve been in operation now for about (6) years (since Hurricane Sandy). I imagine they need some attention after all that time!

  • @wmrast
    @wmrast 3 года назад

    Kudos on a really well produced video. Gives me a lot of confidence to do this myself when it’s time. Set an annual reminder on my calendar with a link to this video. Thanks!

  • @TamOClannie
    @TamOClannie 3 года назад

    Just finished cleaning mine with your help. Thanks man.

  • @alblake8082
    @alblake8082 3 года назад +2

    This tutorial is very thorough and easy to follow. Thank you!

  • @Shao-wen_Wu
    @Shao-wen_Wu 3 года назад

    Wow thank you so much man! It's the most detailed tankless water heater cleaning/flushing video. I live in the city which has lots of mineral in the water, so to pay maintenance it would cost a lot.

  • @RafaelGarcia-vw1ge
    @RafaelGarcia-vw1ge 4 года назад +1

    Thank you, berry well explained. I’m thinking of getting one for my house.

  • @SuperRabbitfighter
    @SuperRabbitfighter 4 года назад

    Great video. Do well done and clear and bright. Ready to do my own now!

  • @stevehughes5403
    @stevehughes5403 4 года назад

    I got this exact heater, so great job making the flushing procedure so clear. 4th time I have done mine but like to refresh myself on the steps. Thanks.

  • @C_mao
    @C_mao 3 года назад +4

    Woo hoo! Hell yeah! You’re a helluva guy, that you do this for your customers is above and beyond! I definitely learned something today! (:

  • @RFMAPRES
    @RFMAPRES 4 года назад +1

    Thanks Ray - awesome job - followed your instructions to the letter and it worked like a charm Thank you from Canada

  • @johnschreiber5163
    @johnschreiber5163 4 года назад

    Great Vid and I'll only add that my Navien was installed Spring 2012 and I've not had an ounce of trouble with it.

  • @kimberlydidia39
    @kimberlydidia39 2 года назад +3

    Really great video. Love the step by step to take out any confusion of what to do when! Thank you!!

  • @robgrieve2252
    @robgrieve2252 Месяц назад

    I would hire you in a heart beat! The world needs more trades people like you!!

  • @pkenneally
    @pkenneally 3 года назад

    Thank you very much for the fantastic video. Very helpful and selfless of you. You're a good man, Ray.

  • @carloszavarce1715
    @carloszavarce1715 4 года назад +6

    Thanks this video was perfect. Helped with my E.016 error!

  • @devindombrowski8401
    @devindombrowski8401 3 года назад +1

    This is the first video that clearly explains how to do all this. Thank you!

  • @ace00007
    @ace00007 Год назад +1

    Very helpful. Getting a Navien installed in about a week and I saved this video to refer back to when I need to do routine maintenance.

  • @jasplund91
    @jasplund91 Год назад

    Great video walkthrough! Gave me the confidence to DIY my first annual maintenance. Thank you so much!

  • @ufitocc
    @ufitocc 2 месяца назад

    This guy is the GOAT. Used this on a Navien 240a2 that was installed last year.

  • @matthewmccauley2907
    @matthewmccauley2907 Год назад +1

    Use this video as a reference every year when I clean our Navien. I'm so glad I found this video. It makes it easy to navigate through the steps even though it's not the exact model.

  • @chrisjarrett66
    @chrisjarrett66 3 года назад +1

    Super helpful video!! I followed you step-by-step and the cleaning process worked flawlessly. Thanks so much for this great video!

  • @wateraries23
    @wateraries23 Год назад

    Thank you for this video. It made cleaning my tankless so easy. I even did my neighbors. We didn’t have a hot water shut off valve so I just ran the sinks for a minute or so until the vinegar was out of the lines.

  • @paulhenry1338
    @paulhenry1338 2 года назад +1

    This was a perfect how-to video. I performed the maintenance on my Navien water heater today with confidence after having watching the video.

  • @zzhou1557
    @zzhou1557 2 года назад

    Hello! I just got my NPE 240a2 installed and I definitely will be doing this! Thank you for putting this up!

  • @joespeciale5875
    @joespeciale5875 Год назад +2

    Thank you Ray for a methodical, step-by-step process in this procedure..

  • @docktier8194
    @docktier8194 4 года назад +16

    I watch a walk through on doing this every year just to make sure I don't forget a step. This is the best one anyone has done yet! No one ever mentioned the dirt trap in the previous ones I watched so mine was nearly full. Thank you! I have a Navien NR - 240A. Is the water filter in a different location or is my model not equipped with one? Awesome video!

  • @vergemonton7432
    @vergemonton7432 2 года назад

    Easy to follow.. thanks for having this video.. i had my first clean.up after 4 years. I never thought that Tankless Water Heater needs maintenance. Good thing this video came so handy that i did not encounter any issues.

  • @5te3lerboy
    @5te3lerboy 23 дня назад

    Fantastic video. Lucky enough to purchase our first home, and it came with one of these water heaters. You guys are awesome, thank you so much!

  • @rodneyarmanie8069
    @rodneyarmanie8069 Год назад +3

    Excellent video! Clear, concise and to the point. Watched it a couple of times before doing the job and didn't encounter any issues. Thanks.

  • @danluoma2257
    @danluoma2257 2 года назад

    Thanks for this! Just used the video to do this myself for the first time on my new house and it was a great guide!

  • @paulr.williams2394
    @paulr.williams2394 2 года назад +6

    Great video - thank you! I would like to add a couple of critical additional pointers that were omitted from your tutorial:
    1) If there are multiple units running in Cascade mode, before flushing, you MUST FIRST take them out of Cascade mode, by doing the following (If you do not do this, the Cold Water service inlet will not allow water into the unit and your pump will be dead-ended):
    - Turn on all water heaters using the Power button.
    - On the master water heater, press and hold the Diagnostic and Reset buttons for more than 5 seconds. The water heaters will revert to independent operation. Then, turn the units off and they will be ready for flushing.
    - After flushing and maintenance are complete, turn on all water heaters using the Power button.
    - To reinstate Cascade mode:
    A. On the unit you intend to be the Master water heater ( I rotate mine every year), press and hold the Diagnostic and Up(+) buttons for more than 5 seconds. “MA.00” will appear on the display to confirm that this water heater is set as the master.
    B. On the slave water heater, press and hold the Diagnostic and Down(-) buttons for more than 2 seconds. “SL.01” will appear on the display to confirm that this water heater is set as a slave.
    C. Repeat step 2 to configure the rest of the slave water heaters in the system, i.e., "SL.02"...
    D. On the master water heater, press and hold the Diagnostic and Up(+) buttons for more than 5 seconds. All the display screens on the configured water heaters will return to the temperature display.
    2) If you are using External Recirculation, don't forget to clean that Recirculation Inlet filter in addition to the Cold Water Inlet filter (they are exactly the same filters).
    3) After draining and before flushing, DO NOT FORGET to move the lever on the Safety Relief Valve back down to its normal operating position! I learned this mistake the hard way, after I had pumped 5 gallons of vinegar into the drain because the safety valve was still open!! DUH LOL!!

  • @bsharn3927
    @bsharn3927 Год назад +1

    Thank you. A plumber told me that they use a special chemical to clean the tank and it will cost me $600 each year. This video has saved me my hard earned money

  • @mbaxter571
    @mbaxter571 3 года назад

    Thank you very much. One of the best "how to" videos I have watched.

  • @putod
    @putod 3 года назад

    This dude is amazing!! Easy to follow step by step

  • @PhuongNguyen-wj2ty
    @PhuongNguyen-wj2ty 4 года назад

    Thanks for excellent video. It showed exactly and step by step how to clean the Navient water heater, where are the screws, filters, valves

  • @chrisgarcia1845
    @chrisgarcia1845 3 года назад

    I appreciate this video! Very well done. I have a Navien Tankless and you explained everything.

  • @tomreid3802
    @tomreid3802 4 года назад +1

    Just completed performing maintenance on my Naview 240A for the first time. With the assistance of your video this task went very smoothly without any trouble at all. Thank you so much for your very excellent video.

  • @joes6280
    @joes6280 Год назад +1

    Thank god for videos like this. I wish I lived near this guy so I could buy a system off of him.

  • @basharatsadaf2577
    @basharatsadaf2577 3 года назад

    Ray, you are the best, thank you very much for sharing your knowledge

  • @StochasticsAndHullAvg
    @StochasticsAndHullAvg 2 года назад +1

    Ray, thanks for the extremely helpful video. Your clear instructions made the process a snap for me.

  • @ray3172
    @ray3172 3 года назад +1

    You saved me $250.00 and now I have invested on a water pump to do my regular maintenance. Thanks again!!!

  • @Amit-zz9yb
    @Amit-zz9yb 4 года назад +1

    Thank you for a great video...I have the same unit in my house and will do this tomorrow.

  • @rkjz
    @rkjz 4 года назад +4

    Fantastic video - easy to follow. Just finished cleaning my Navien for the first time since installed. Thank you!

    • @gm3430
      @gm3430 4 года назад +1

      Rich DeLuca rich where did you buy the hoses and pump?

    • @josephwazocha140
      @josephwazocha140 4 года назад +1

      @@gm3430 You can get the hoses and pump at home depot. The hoses are washing machine hoses. As far as the pump goes, from other videos I've watched you only need about a 1/6 th horsepower pump. They say it will give the solution time to eat away at the crap because of a lower flow rate.