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Plumbing

15mm LIFF scale inhibitor on a 22mm feed line

Anonymous user 28/02/2024 - 3.10 PM

We have an unvented mains fed hot water system running from a Worcester Greenstar AE boiler. The water tank is a HeatRae Sadia Megaflo Cylinder. Feed to the house is 22mm. This runs through a 3 bar Megaflo cold water valve, which I have just found out runs into a 15mm LIFF magnetic in line scale inhibitor ('step down' fittings have been used to connect this in line) then back into 22mm which then feeds the house and the cylinder. The bathroom fittings are 15mm copper from the cylinder. The question is if I change the LIFF scale inhibitor to a 22mm in line scale inhibitor, will this increase the incoming pressure to the cylinder and subsequently lead to a greater flow through the 15mm bathroom feed pipes, resulting in a more powerful shower? Hope I've not over complicated things through my explanation...Thanks in advance for any help/info!

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1 Answer

Anonymous user

It's not good work practice going from 22mm to 15mm and then back to 22mm again its like squeezing a hose pipe, I would change the LIFF magnetic in line scale inhibitor, also a lot of showers and taps do come restricted normally between 9/11lt's per min of flow rate this is a EU regulation to save water, so you might also have restriction in these areas too

Answered27 January 2015