Hi,
I replaced a radiator valve, but my replacement is leaking as well. Here's what I did:
1. Switched off my Worcester Greenstar 24i combi boiler
2. attached a hose to the drain valve by a radiator, tried draining whilst opening all valves, but this didn't quite work (look at the pic and you'll see how ridiculously low the drain valve is).
3. Opened all bleed valves and drained the water down from the radiator valve by using several buckets.
4. Once fully drained I left the old radiator tail in place, as I didn't have a hexagonal rad key to remove it.
5. Cleaned up pipework using wire wool.
6. Applied 5 loops of PTFE tape to both sides of valve and put valve in.
7. Tightened valve nuts.
Here's where it gets a bit dodgy:
1. I re-pressurised the system, but noticed the pressure gauge wasn't increasing. Wondering whether the electrical power to the boiler needs to be on before the gauge kicks in, I turned the power on (but not central heating or hot water) and continued pressuring the system. After 30 - 60 seconds I turned the boiler off and continued pressurising the system until it hit 1.5 bar.
2. Powered boiler back on and turned on central heating, then bled radiators and re-pressurised the system back to 1.5 bar.
3. After a few hours I noticed a leak in the valve, so I tightened the nuts as much as possible, but it still slightly leaks. I've now decided to put some jointing compund around the valve, but suspect this won't solve the leak.
4. I noticed something quite odd, my boiler pressure jumped up to almost 3 bars last night and I don't know why (filling loop is off)
What would you recommend? Should I have replaced the radiator tail as well?
Can I drain the water in the system from the boiler itself?
Radiator valve - http://i48.tinypic.com/21ltjpu.jpg
Low drain point - http://tinypic.com/r/2qcpe04/6
Boiler - can I drain from here? http://tinypic.com/view.php?pic=j580i1&s=6
Thanks[/img]
I replaced a radiator valve, but my replacement is leaking as well. Here's what I did:
1. Switched off my Worcester Greenstar 24i combi boiler
2. attached a hose to the drain valve by a radiator, tried draining whilst opening all valves, but this didn't quite work (look at the pic and you'll see how ridiculously low the drain valve is).
3. Opened all bleed valves and drained the water down from the radiator valve by using several buckets.
4. Once fully drained I left the old radiator tail in place, as I didn't have a hexagonal rad key to remove it.
5. Cleaned up pipework using wire wool.
6. Applied 5 loops of PTFE tape to both sides of valve and put valve in.
7. Tightened valve nuts.
Here's where it gets a bit dodgy:
1. I re-pressurised the system, but noticed the pressure gauge wasn't increasing. Wondering whether the electrical power to the boiler needs to be on before the gauge kicks in, I turned the power on (but not central heating or hot water) and continued pressuring the system. After 30 - 60 seconds I turned the boiler off and continued pressurising the system until it hit 1.5 bar.
2. Powered boiler back on and turned on central heating, then bled radiators and re-pressurised the system back to 1.5 bar.
3. After a few hours I noticed a leak in the valve, so I tightened the nuts as much as possible, but it still slightly leaks. I've now decided to put some jointing compund around the valve, but suspect this won't solve the leak.
4. I noticed something quite odd, my boiler pressure jumped up to almost 3 bars last night and I don't know why (filling loop is off)
What would you recommend? Should I have replaced the radiator tail as well?
Can I drain the water in the system from the boiler itself?
Radiator valve - http://i48.tinypic.com/21ltjpu.jpg
Low drain point - http://tinypic.com/r/2qcpe04/6
Boiler - can I drain from here? http://tinypic.com/view.php?pic=j580i1&s=6
Thanks[/img]