B
btibuzz
Been browsing the forum for a couple of days and whilst I've found similar problems to mine - I don't think I've found exactly what I need - hope someone can make sense of it.
Situation is...
2nd floor flat - two bathrooms, one kitchen running off a combi boiler.
Water to the taps pumped from hot and cold tanks in the loft, via a Stuart Turner Dual Monsoon Pump (Standard - Not universal).
This was put in 4-5 yrs ago when place was converted - I specced tanks and pumps rather than relying on the combi, even though mains pressure is ok because I wanted full-on showers. (Which they are)
Had a leaking shower valve, and turned off feeds in order to fix. The only isolation valve for the hot feed was a gate valve between the tank and the pump. Once fixed, the gate valve (one with the red cage head) for the 22mm hot feed wouldn't turn back on. Don't really understand the boiler/hot-tank system so didn't want to drain system and used a wickes pipefreezing kit (I know) to allow me to swap out the valve. All was going well until I broke an elbow near the tank while tightening the new valve.
Got it under control eventually replacing the elbow and the valve but I did lose a lot of water and ever since then the hot feed has spluttered and spurted pretty much continously.
It is worse when you first open a tap, but it occurs when any or all 6 of the hot taps are opened. I assume I've got air in the hot circuit somewhere that's interfering with the pump.
When you listen to the vent pipe from the hot tank that's hanging over the cold tank you can hear a sucking noise that coincides with the spluttering supply.
From reading the forums there appears to be 2 main ways of getting rid of air in the hot circuit....
1) Connecting mains tap to hot tap and opening to force air back out the other way into the tanks.
However as the system is pumped would this even work? and secondly I don't have a mains tap. (Secondary Question - Should I have one? Kitchen cold is fed from tank like all the others.)
2) Turn off (bung) cold feed to hot tank, drain hot tank, open taps, to void system, turn on cold feed to hot tank, once water comes out of all taps, close taps. From what I understand this should allow the system to fill properly (allowing trapped air out the vent?)
My concern with this is - won't that leave the pumps pumping air until the system starts filling again? IS that ok or would I knacker the pump - Will a drained system be a problem for the combi?
Apologies for the long mail, and feel free to shout abuse if I've missed something obvious, or if you think I'm in over my head.
Cheers
Paul
Situation is...
2nd floor flat - two bathrooms, one kitchen running off a combi boiler.
Water to the taps pumped from hot and cold tanks in the loft, via a Stuart Turner Dual Monsoon Pump (Standard - Not universal).
This was put in 4-5 yrs ago when place was converted - I specced tanks and pumps rather than relying on the combi, even though mains pressure is ok because I wanted full-on showers. (Which they are)
Had a leaking shower valve, and turned off feeds in order to fix. The only isolation valve for the hot feed was a gate valve between the tank and the pump. Once fixed, the gate valve (one with the red cage head) for the 22mm hot feed wouldn't turn back on. Don't really understand the boiler/hot-tank system so didn't want to drain system and used a wickes pipefreezing kit (I know) to allow me to swap out the valve. All was going well until I broke an elbow near the tank while tightening the new valve.
Got it under control eventually replacing the elbow and the valve but I did lose a lot of water and ever since then the hot feed has spluttered and spurted pretty much continously.
It is worse when you first open a tap, but it occurs when any or all 6 of the hot taps are opened. I assume I've got air in the hot circuit somewhere that's interfering with the pump.
When you listen to the vent pipe from the hot tank that's hanging over the cold tank you can hear a sucking noise that coincides with the spluttering supply.
From reading the forums there appears to be 2 main ways of getting rid of air in the hot circuit....
1) Connecting mains tap to hot tap and opening to force air back out the other way into the tanks.
However as the system is pumped would this even work? and secondly I don't have a mains tap. (Secondary Question - Should I have one? Kitchen cold is fed from tank like all the others.)
2) Turn off (bung) cold feed to hot tank, drain hot tank, open taps, to void system, turn on cold feed to hot tank, once water comes out of all taps, close taps. From what I understand this should allow the system to fill properly (allowing trapped air out the vent?)
My concern with this is - won't that leave the pumps pumping air until the system starts filling again? IS that ok or would I knacker the pump - Will a drained system be a problem for the combi?
Apologies for the long mail, and feel free to shout abuse if I've missed something obvious, or if you think I'm in over my head.
Cheers
Paul