I've got that too in my campervan, you're right about that connection, I've got it to just about work with the blue tube used in a campervan and hasn't fell off yet, had to drill out that hole.
You want 8mm garden hose, luckily I had some from a cheap gardening hose reel. You can get the ends off Ebay from China for $3, in Australia, they stock 8mm (red Pope) fittings at Bunnings for $5, both of which connect to standard 12mm. The distance past the barb I don't think is an issue, its the barb that makes the seal against the nut - hose fittings are roughly the same in this respect. Just tested mine (0.9Mpa) and works fine, didn't blow the hoses off when flow was restricted.
I have two of these from a purchase several years ago. They were cheap and I thought they might come in handy. I need to move water up a 3ft intake and expel it 3ft above that. A very shallow well. Wish me luck :)
@jsmythib Mine pump a ton of water up 18 meters (54 ft) every day. They last 3+ years. I don't know how much suction they have. The inlet pressure on mine is very, very low, but positive.
@@tsbrownie As it turns out my 12v eco-worthy pump didnt die yet*(they last 2 years) I just blew off a diy connection underwater. A hand dug garden/chicken/backup well 4x4x12. Good to hear my backup should work. Worst case I may have to float it on the waterline.
Wow! What amazing timing that you just posted this video!! I bought this exact model and it arrived today, and I ran into the same problems you mentioned! Fortunately I'm using it for very low-pressure project (recirculating warm solar heater water into a soaking tub), so my fix will hopefully work: I wrapped silicone tape around the threads and happened to have hose that fit just perfectly over the silicon sealed threads. I added a hose clamp and tested, and it seems to be working great. @tsbrownie: I luckily stumbled on this great video after it was suggested at the end of your awesome diaphragm pump teardown video. Do you have any thoughts on how durable these diaphragm pumps are compared to similar-priced centrifugal pumps (like those used in water fountains)? Do you think they will last as long? What about continuous use of one vs. the other? Thanks again for your great videos, I'm subscribing!
I've had very good luck with these RO water filter diaphragm pumps. On average they have lasted 3 years in my application of pumping an average of 1 cubic meter of water per day at a head of 18 meters. They fail when the rubber breaks down (a silicone version would last a lot longer). I've seen them used in a chemistry department pumping chemicals in an experiment that continously ran for weeks at a time. I've tried other types of pumps that claim to be able to produce 80 PSI and so far not one has lived up to it.
@@tsbrownie thanks for all that! I'll definitely keep it out of the sun / elements to preserve the rubber as long as possible. I've also been experimenting running it off different wall adapters I've got lying around. I know it says 12v 60 watts, but I've run it very successfully with a 12v 850 mA adapter. I'm not planning to use it for more than a few hours a day and in very low pressure. Do you think that will degrade it's life, potentially increase it (since it's not working as hard?) or no real impact?
@@Nifty-Stuff From my experience, the decay is just a matter of aging, not really of use. The rubber does not crack, it just begins to rub off until the valves and pistons don't seal.
I've got that too in my campervan, you're right about that connection, I've got it to just about work with the blue tube used in a campervan and hasn't fell off yet, had to drill out that hole.
Thanks for the info. I suspect it's a common problem with it.
You want 8mm garden hose, luckily I had some from a cheap gardening hose reel. You can get the ends off Ebay from China for $3, in Australia, they stock 8mm (red Pope) fittings at Bunnings for $5, both of which connect to standard 12mm. The distance past the barb I don't think is an issue, its the barb that makes the seal against the nut - hose fittings are roughly the same in this respect. Just tested mine (0.9Mpa) and works fine, didn't blow the hoses off when flow was restricted.
I've seen that kind of connection done to outlet of my cheap hand pump to that small of a 'spear'. It was glued and the whole thing was equally bad
I have two of these from a purchase several years ago. They were cheap and I thought they might come in handy. I need to move water up a 3ft intake and expel it 3ft above that. A very shallow well. Wish me luck :)
@jsmythib Mine pump a ton of water up 18 meters (54 ft) every day. They last 3+ years. I don't know how much suction they have. The inlet pressure on mine is very, very low, but positive.
@@tsbrownie As it turns out my 12v eco-worthy pump didnt die yet*(they last 2 years) I just blew off a diy connection underwater. A hand dug garden/chicken/backup well 4x4x12. Good to hear my backup should work. Worst case I may have to float it on the waterline.
A diaphragm pump aka a Membrane pump is only LOW pressure pump and these connectors has to be used with silicone/latex tubing only.
Wow! What amazing timing that you just posted this video!! I bought this exact model and it arrived today, and I ran into the same problems you mentioned! Fortunately I'm using it for very low-pressure project (recirculating warm solar heater water into a soaking tub), so my fix will hopefully work: I wrapped silicone tape around the threads and happened to have hose that fit just perfectly over the silicon sealed threads. I added a hose clamp and tested, and it seems to be working great.
@tsbrownie: I luckily stumbled on this great video after it was suggested at the end of your awesome diaphragm pump teardown video. Do you have any thoughts on how durable these diaphragm pumps are compared to similar-priced centrifugal pumps (like those used in water fountains)? Do you think they will last as long? What about continuous use of one vs. the other? Thanks again for your great videos, I'm subscribing!
I've had very good luck with these RO water filter diaphragm pumps. On average they have lasted 3 years in my application of pumping an average of 1 cubic meter of water per day at a head of 18 meters. They fail when the rubber breaks down (a silicone version would last a lot longer). I've seen them used in a chemistry department pumping chemicals in an experiment that continously ran for weeks at a time. I've tried other types of pumps that claim to be able to produce 80 PSI and so far not one has lived up to it.
@@tsbrownie thanks for all that! I'll definitely keep it out of the sun / elements to preserve the rubber as long as possible. I've also been experimenting running it off different wall adapters I've got lying around. I know it says 12v 60 watts, but I've run it very successfully with a 12v 850 mA adapter. I'm not planning to use it for more than a few hours a day and in very low pressure. Do you think that will degrade it's life, potentially increase it (since it's not working as hard?) or no real impact?
@@Nifty-Stuff From my experience, the decay is just a matter of aging, not really of use. The rubber does not crack, it just begins to rub off until the valves and pistons don't seal.