Plumbing help - Novice to say the least

[mosa]

Hello there i know nothing about plumbing but i have fitted a ariston 10ltr skw under bench water heater and followed the directions etc. I find though that the presure relief valve passes constantly. Any reasons why. ps i dont know the flow rate so may need a reducer valve?. Its the secont pressure valve ive fitted to the unit and both do the same. Please help

 

[Simon F]

Hello Mosa,
what is the water pressure where you are?
do you need a pressure reducing valve?
what do the instructions say?

 

[secret squirrel]

I would think (just tried to look it up) the pressure is to high on the incoming mains! What is the pressure coming in? what is the pressure reducing valve set to? if it hasn't got one need to know what the pressure is coming in then fit a PRV and set it accordingly

 

[secret squirrel]

Hello Mosa,
what is the water pressure where you are?
do you need a pressure reducing valve?
what do the instructions say?

Should change my signature to see above.....

 

[WaterTight]

Yeah, 'cos frankly your current signature is a bummer.

 

[secret squirrel]

Yeah, 'cos frankly your current signature is a bummer.

I'll think of something more upbeat for you...... but only for you.....

 

[tamz]

Depending on the incoming pressure you will need the additional kits for expansion and pressure reduction.

 

[Guest123]

I'm assuming that it's an unvented under the counter heater? If so the minimum pipe run is 1.8m or it needs a expansion vessel.

 

[mosa]

i dont have a prv but thinking of buying one tomorrow. Ive no idea of flow rate at the moment> i thought if i turned the check valve closed slightly it may reduce the flow but that didnt work either.

 

[Guest123]

Most water heaters I've fitted work at 3 bar max, so if it's more than this fit a PRV on the INCOMING main and adjust it accordingly.

I really think that you should have got a plumber in to do this. Are you qualified to do the electrical connections on this?