sludge cleaner

[MisterDrew]

Hi all

Need some advice with regards to a problem I have.
I phoned a plumber about a couple of pipes in the central heating which are not getting hot and he said to pour sentinel 400 into the system which will save me having to pay him to come out.

However after looking at the instructions for that item of course it has to go in the pipes but how do you do that? Also how do you drain the system after it's been in for 4 weeks (recommended length of time) when our system has no drain off point?

I have noticed at the top of a couple of the radiators there is a big silver nuts (on a single panel raidiator) can I just drain that radiator and then take that nut out and pour it in there and then turn three heating back on?

Any help anyone can give would be most appreciate

Thanks

Drew

 

[Armo74]

Type of system please.

 

[gas_man_gaz]

id phone a different plumber

 

[JohnD]

if you undo one nut from one radiator, water will gush out until all the pipes and radiators above it, including the F&E tank, are empty.

Search around your system for a drain cock. It should be at or about the lowest point of the system. It might be close to the boiler or it might have ben conveniently positioned near to a downstairs outside door so that you can put a hosepipe through it.

drain cocks usually leak so have a good supply of basins and old towels. If the perished remains of a rubber washer fall out, fit a new one.

you have to tie up the float in the F&E tank before starting to drain.

Bale out all the mud from the F&E and sponge it clean before starting to drain.

some typical drain cocks:

you can also drain it by unscrewing a rad valve but this will let a lot of water out. Fit a drain cock or two before refilling.

 

[MisterDrew]

Type of system please.

It's a vokera combined boiler

 

[MisterDrew]

if you undo one nut from one radiator, water will gush out until all the pipes and radiators above it, including the F&E tank, are empty.

Search around your system for a drain cock. It should be at or about the lowest point of the system. It might be close to the boiler or it might have ben conveniently positioned near to a downstairs outside door so that you can put a hosepipe through it.

drain cocks usually leak so have a good supply of basins and old towels. If the perished remains of a rubber washer fall out, fit a new one.

you have to tie up the float in the F&E tank before starting to drain.

Bale out all the mud from the F&E and sponge it clean before starting to drain.

some typical drain cocks:

you can also drain it by unscrewing a rad valve but this will let a lot of water out. Fit a drain cock or two before refilling.

Well I'd agree about the drain points but there are no drain points anywhere on the system

 

[Armo74]

Close both valves on the smallest rad, drain it down by cracking the union nut on one of the valves then add the x400 into the rad and top the system up and vent the rad.

 

[MisterDrew]

Close both valves on the smallest rad, drain it down by cracking the union nut on one of the valves then add the x400 into the rad and top the system up and vent the rad.

Ok I'm happy draining it that way but how do I pour it in when the hole is then at the bottom of the radiator, it will just come straight out. Hence why I mentioned the big silver nut at the top, sorry no idea what that is call

 

[Armo74]

Undo the vent plug and either buy a filling kit from screwfix or you can make a filling device out of a funnel,piece of hose pipe and copperpipe and a isolation valve

 

[MisterDrew]

Undo the vent plug and either buy a filling kit from screwfix or you can make a filling device out of a funnel,piece of hose pipe and copperpipe and a isolation valve

Thank you, all for your replies

 

[TonyW2]

Well that would get the cleaner in, but the system will still need draining later.
I do not believe that there is no drain point.
Look harder.
It may be included near a radiator valve.

 

[HERTS P&D]

Or on an outside wall.

Andy