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Have you tried reseting the boiler? turn off at fused spur and back on.

Plumbers merchants sell a clamp on fitting for the flush pipe to take the overflow i'm not sure what it's called but any good plumbers merchant will.

You don't really need anymore valves, if you have balafix type pump valves you could change them for gate type for future pump changes as the balafix type tend to leak when turned off or on. Don't fit any type of valve in the open vent or cold feed pipes. Make sure you have drawoff cocks at...

High pressure for mains, low pressure or tank fed appliances. Part one does not comply with byelaws, part two does.

Hi your boiler has four pipes connected to it, two from the top connections and two from the bottom connections. The two which are the flow and return pipes to the cylinder remove from boiler, connect the new 15mm cold feed/expansion pipe which you bring down from the bottom connection of the...

If you mean the pipe coming out of the bottom of the f&e tank yes. To give exact pipe layout advise pic's are really required. Have to continue tomorrow need my sleep now.

The feed goes on return the open vent goes on the flow before pump yes. But you are confusing the expansion, the cold feed pipe is also the expansion pipe, the open vent is what it says.

What size is the existing gravity flow & return pipes?. Can you post pic's as requested?.

Yes you could fit motorised valve down at boiler. The cold feed/expansion pipe would be okay in 15mm but the open vent pipe would need to be 22mm. Can you post name/make of boiler and pic's of boiler and cylinder areas.

On old gravity fed hot water systems the open vent is taken from the flow pipe to the cylinder and the cold feed/expansion pipe is taken from the return pipe to the cylinder. If you connect the gravity flow and returns to the pumped heating ones as you are suggesting, the open vent and cold...

You can fit a wireless cylinder stat in the airing cupboard and place the receiver wherever the zone valve is to be located. The range from the transmitter is about 30 metres for the Danfos one. You must of course never allow the open vent to become closed under any circumstances ever, at...

If the cold feed for shower mixer is fed from storage tank and hot is from a combi boiler which is mains fed you have unequal pressures and in some rare occasions water can go back up cold feed and give the symptoms you describe, if you fit a non return valve to cold feed to shower mixer pipe...

Yes they do just sit on pedestal, with the basin positioned correctly ie back flush with the wall the holes each side of basin are for holding it back to wall, the pedestal holes at bottom are to stop pedestal twisting etc, you can use a mastic between basin and pedestal if you wish.

You don't say where they go into outside, do they join a soil stack or waste pipe?. If they join a soil stack then they should be as they are not joined together, also sometimes joining a basin waste to a bath waste can give you a backsurge into bath.

You need a pan connector for a HO pan where ever you buy it, if the one in the picture has large rubber part it's not correct it should have small rubber seal.

Your type of system is one of the hardest types to purge of air, each drop to radiators should have a draw off fitted at low level preferably on both flow and return pipes draw offs on flow and return to boiler, air vents at all high points on all pipes in loft area. When draining system drain...

If it is existing Byelaws don't apply but thats not the case, so i would ignore that advise.

The reason for the length of pipe is to stop self syphonage of the trap which would remove the water seal allowing foul smells to enter (not nice) if you have to do it the way you show make sure you use a 75mm trap not a shallow seal one, and i would suggest you use 2 inch 50mm pipe with...

Mid 80's called out to a pub job in south london, when we arrived we found heavy wooden door complete with frame on the pool table, window plus frame complete with burglar bars in car park, roof of gents toilets raised by six inches (back addition flat roof) not one tile left on the wall of a...

You say you have replaced with 15/60 are you sure you didn't have a 15/50 pump before as 15/60 is higher head usually fitted in combi