ACS Gas Essentials - Pipe Sizing Pt4 Multiple Appliances

This video uses the Viper Book pipe sizing technique. There are others but this is an easy way to arrive at an accurate result. You will be expected to carry out this exercise in both your written and practical examination.

[@mrahmed7831]

Hi I do appreciate the time you took to produce this amazing video how to pipe size. Many thanks great Man.

[@KUKIARYA]

Thank you

[@raphaelcharles5538]

Hi thanks for all you videos. Any chance of a video on the positioning of notches, drilling of joists. For example understanding the positions in which holes can be drilled. Acs exam in few weeks and trying to cover all areas.

[@passyourgas]

I’m just about to post one on combustion analysis and I’ll do one on joists etc straight after that. Should be Monday or Tuesday…Thanks for your request…🙏

[@paul_my_plumbs_uk]

How do you work out pressure drop to comply with the 1mb??

[@raphaelcharles5538]

I wasn't given a viper book only the gas books. Can I access the viper data table in the gas book?

[@passyourgas]

Hi Raphael, the Viper book is just a gas book like yours, only printed by Viper…ALL the gas books have the data table in them. In fact the one I showed was from a different book … so it will be in your book somewhere….cheers

[@shredder8000]

I’m a bit confused about the pressure drop situation, let’s say u got 3 appliances on a system, boiler, cooker & a fire, is it a 1mb drop across the whole system or are u allowed a 1 mb drop at each appliance

[@passyourgas]

Hi shredder. This means gut sound a bit more complicated than it actually is. The max pressure drop you are allowed per appliance is 1mb. However if you sized the pipes to allow a 1mb drop at each appliance then when all 3 of them were on you would suffer a 3mb drop across the whole system so each appliance would suffer a 3mb drop. By dividing the allowed drop by how many appliances there are (let’s say 3) and only allowing a 0.3mb drop to each appliance that means that when all 3 are on the entire system will only drop 0.9mb so all the appliances will be within limits. Hope that clears things up…

[@hgh6791]

Hi
If the overall pipe size for on appliance exede 40 mm , which is not in the chart, how could be calculated?
Thank you

[@passyourgas]

Then it falls outside of “domestic” and you need to take another course to be qualified to work on it. Thanks for the question.

[@passyourgas]

Hi H GH , sorry, I missed your question when you posted it..if you’re working on 40mm pipework you are no longer working on domestic gas and must have a commercial gas licence, it’s a completely different thing. Domestic gas only goes up to 35mm that’s why you won’t see it in the charts. Sorry again for the late reply..

[@hgh6791]

Hi Sir
In real calculations there is 2 elbow after meter before the main length begin,we should take them to calculate?
Thanks again.

[@BoilerrepairNet]

Hi I was interested if we could work together?

[@passyourgas]

Thanks for the comment. What were you thinking of doing? Drew.

[@mrahmed7831]

Hi I do appreciate the time you took to produce this amazing video how to pipe size. Many thanks great Man.

[@passyourgas]

Thanks Mr Ahmed. Your encouragement really helps. Good Luck with your course.