Discuss Showers with 125mm pipe centres in the Plumbing Jobs | The Job-board area at PlumbersForums.net
Bristan acute
I'm Installing one tomorrow, hopefully goes okay... it's on gravity so will be interesting to see performance as it states suitable for 0.1 bar
If you are installing this on 0.1 Bar then consider removing the non return valves when you fit it. On low pressures they have a tendency to stick and you may end up being called back due to no flow. If in doubt try blowing through the inlet elbow and you will soon see what I mean!
I have been considering this to increase the flow rate... are non return valves required on a tank fed hot & cold system... it can't back feed surely!?
I emailed bristan this very question & they recommended keeping them in etc as I was expecting!
I can't blow through th check valves relatively easily, but still a restriction no doubt
They dont actually restrict the flow too much but every little helps. The real problem is when the shower hasn't been used for a while and the spring in the NRV keeps putting pressure on the seal and it becomes stuck, it's a real nussiance.
Only real issue with removing NRV's is when your customer then has a combi fitted and then doesn't refit them....
Or bristan dodge a warranty claim,
Isn't a combi equal pressures too tho, I guess the cold mains has more flow still and could overpower maybe?
Reply to Showers with 125mm pipe centres in the Plumbing Jobs | The Job-board area at PlumbersForums.net
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