[Ian101]

My booster pump is fed from a 15mm supply with one of these non return valves shown in photo.

Do I need a non return valve as its starting to squeal like a pig when the booster pump is doing its thing and if I changed the 15mm supply to say 22mm would it benefit faster water production ??

[spongebob]

Just get rid of that. A bit over the top for a garage tap. Whats further down the pipe where the ro unit connects?

If it is an outside tap you could change that for a non return type tap.

You would need to change the 15 to 22 supply right back to the stop tap or wherever it it is running in 22mm.
You would only increase flow and not pressure. You can do a quick test to measure your flow in litres per minute. If you have 30l/min now you probably wouldnt increase it by much. Most increases in pure output are created by increased pressure.
If you have 30 l/min now and your waste is 2:1 then you are producing 10 l/min of pure that would be 600litres per hour. Almost impossible but hope the example explains what I mean. You wouldnt likely get that much with 30l/min so any increase wouldnt result in faster pure production as you are probably at max output rate for your system with the current supply rate.

[bobplum]

firstly,nice manicured finger nails for a window cleaner

not knowing the lay out of the piping system i would take the view that the non return valve is not going to do any harm being there.
as sponge bob said it is a bit ott for a garage,so if you did remove it you could fit an isolating valve and this would allow you too isolate the system from the rest of the layout when needed
non return valves are used to stop cross contamination,ie hot water into cold etc
as for the 22 mm you would not gain much

[Frankybadboy]

Just get rid of that. A bit over the top for a garage tap. Whats further down the pipe where the ro unit connects?

If it is an outside tap you could change that for a non return type tap.

You would need to change the 15 to 22 supply right back to the stop tap or wherever it it is running in 22mm.
You would only increase flow and not pressure. You can do a quick test to measure your flow in litres per minute. If you have 30l/min now you probably wouldnt increase it by much. Most increases in pure output are created by increased pressure.
If you have 30 l/min now and your waste is 2:1 then you are producing 10 l/min of pure that would be 600litres per hour. Almost impossible but hope the example explains what I mean. You wouldnt likely get that much with 30l/min so any increase wouldnt result in faster pure production as you are probably at max output rate for your system with the current supply rate.

are you a plumber spongebob

[spongebob]

Just get rid of that. A bit over the top for a garage tap. Whats further down the pipe where the ro unit connects?

If it is an outside tap you could change that for a non return type tap.

You would need to change the 15 to 22 supply right back to the stop tap or wherever it it is running in 22mm.
You would only increase flow and not pressure. You can do a quick test to measure your flow in litres per minute. If you have 30l/min now you probably wouldnt increase it by much. Most increases in pure output are created by increased pressure.
If you have 30 l/min now and your waste is 2:1 then you are producing 10 l/min of pure that would be 600litres per hour. Almost impossible but hope the example explains what I mean. You wouldnt likely get that much with 30l/min so any increase wouldnt result in faster pure production as you are probably at max output rate for your system with the current supply rate.

are you a plumber spongebob

Only on the weekends. I can charge more for the call outs 

[mikecam]

I'm not a plumber and i can't believe that no one has picked up on this already. That 'non return valve' is a legal requirement between your mains supply and a pump. So you're probably best to have it, although i doubt it is of any benefit to you it certainley does no harm.
 I wouldn't think 22mm piping will help you, although i admit i'm second guessing by assuming you have still got that pump that kicks in and out?

[Ian101]

by assuming you have still got that pump that kicks in and out?

yup still got it  .... will change it when it dies 

[mikecam]

by assuming you have still got that pump that kicks in and out?

yup still got it  .... will change it when it dies 

jUST BYPASS THE CUT OFF, ITS EASIER !! ....sorry for caps     

[bobplum]

I'm not a plumber and i can't believe that no one has picked up on this already. That 'non return valve' is a legal requirement between your mains supply and a pump. So you're probably best to have it, although i doubt it is of any benefit to you it certainley does no harm.
 I wouldn't think 22mm piping will help you, although i admit i'm second guessing by assuming you have still got that pump that kicks in and out?

do you use a pressure washer mike on your own house,ie for the van drive etc if so when you connect to a mains supply including a outside tap if there is no non return valve fitted then its technical illegal to use the pressure washer,one of the quirks of water law

you are right about the non return valve and the pump,my view was it was ott prior to ians pump being fitted,i didnt explain very well but if i was ian i would still fit an isolation valve and only open it when in use and probably a non return as well

and i wouldn't charge him

[Ian101]

Its got isolation valve as well btw Mike won't be replying soon as he got banned last night