I have a Potterton puma boiler. It has recently been hissing out of the top and sometimes sounded like a steam train. The pressure is low on the boiler. I bled the radiators as I thought this might be the problem but now there is no heating/hot water at all. The low pressure light was on but now its off and the gauge still reads below 1. I have looked online and cant find the valve underneath which increases the pressure in the boiler. Any ideas?!!!!
Bleeding radiators. Looking for valve underneath to increase low pressure in boiler.
Hi I am Rick, UK Plumber, and I specialize on Boiler problems, You need to find the “filling loop” this is a silver braided flexi hose with a tap at one or both ends, connect the hose and turn on the tap/taps until you have 1.5 bar (cold) 2 bar (hot), disconnect when done, this loop is usually near the boiler but can be any where that the cold main runs near the heating pipes,Rick
ABOVE IS THE GAUGEBELOW IS UNDER THE BOILER. This flexi hose doesnt have any taps on it. It was already connected. The blue and red taps you see here turn about 90 degrees and dont appear to do anything to the pressure. The way this boiler works seems different to the many I saw on youtube when trying to find the solution before. Do you know what to do now?!Thanks Rick.
Sorry been out 4x4 off road today, the pics are great, the flexi in the 2nd pic is the filling loop the right side is the boiler side and it has a double check valve, the left side has to have a valve on it, possibly the plastic lever has broken and is missing, in which case you can use an adjustable spanner to turn it on, Rick
Ok this worked! but then it went really high and now the pressures on almost max! how do you reduce it? Sorry!!!
The safest way is by bleeding radiators, a bit slow but safe, Rick
30 Years on the tools, now retired, Ex CORGI