Poor hot water pressure. Cant figure it out.

[g20]

There must be a tee off that pipe from the open vent pipe (the one coming off the top of cylinder) how far up is it?

 

[seco services]

we know the pressure is going to be low due the the pipe going back into the loft. the only way to sort that is raise the tank.

but your taps shouldn't run then just stop that tells me any air from the cyl is not escaping up and out the vent its getting stuck somewhere and stopping the flow.

if you turn on the bath hot tap and where that bend is above your cyl see if you can push it up slightly to prove air isn't getting stuck in the horizontal pipe.
if not its getting stuck further up maybe in the loft horizontal pipework

 

[houstonwehaveaproblem]

The tee I could see up in the roof is positioned about 6 foot above the top of the immersion tank.

 

[seco services]

The tee I could see up in the roof is positioned about 6 foot above the top of the immersion tank.

does the pipe then go vertical to the tank or horizontal then vertical to the tank.

 

[g20]

To be honest best advise for you (since im guessing this kind of thig isnt your forte) is to call a decent plumber out to sort out the dodge piping!

 

[houstonwehaveaproblem]

we know the pressure is going to be low due the the pipe going back into the loft. the only way to sort that is raise the tank.

but your taps shouldn't run then just stop that tells me any air from the cyl is not escaping up and out the vent its getting stuck somewhere and stopping the flow.

if you turn on the bath hot tap and where that bend is above your cyl see if you can push it up slightly to prove air isn't getting stuck in the horizontal pipe.
if not its getting stuck further up maybe in the loft horizontal pipework

Do you mean raise the immersion tank???

That bend in the pipe above the immersion tank is very hot but about 2 foot further up the pipe it is luke warm

 

[houstonwehaveaproblem]

To be honest best advise for you (since im guessing this kind of thig isnt your forte) is to call a decent plumber out to sort out the dodge piping!

Does that piping sound wrong to you then??

Where would an immersion tank/pipework normally be fitted in a bungalow??

 

[houstonwehaveaproblem]

The tee I could see up in the roof is positioned about 6 foot above the top of the immersion tank.

does the pipe then go vertical to the tank or horizontal then vertical to the tank.

From the immersion tank after the bend it goes vertical up into the roof then horizontal and then vertical to the tank

 

[seco services]

no raise the loft tank.

can you with a rag etc push that bend upwards slightly just to take the horizonal off it. and any air trapped their will move.
turn the bath hot tap on first.

 

[seco services]

To be honest best advise for you (since im guessing this kind of thig isnt your forte) is to call a decent plumber out to sort out the dodge piping!

Does that piping sound wrong to you then??

Where would an immersion tank/pipework normally be fitted in a bungalow??

i've got may elderly customers with that layout in early 60's bunglows.
but the loft tank is about 7ft up in the loft and they have very good pressure for a bunglow.

 

[houstonwehaveaproblem]

no raise the loft tank.

can you with a rag etc push that bend upwards slightly just to take the horizonal off it. and any air trapped their will move.
turn the bath hot tap on first.

The roof tank is tight to the roof so it ont go anymore higher.

I cant get that pipe to budge. Do you think the bend is causing an air lock??

 

[g20]

1 thing to cheak that can cause the taps to run dry after a while is that the open vent (the pipe that comes off cylinder at top and they "hooks" over the cold water tank in the loft) isnt submerged in the water in the tank.

Could have been too long and water in tank risen due to faulty ball valve or whatever, so Cheak your open vent hasnt slipped or has been submerged into the water in your tank in loft, this will cause water to "dry up"

 

[houstonwehaveaproblem]

This is an early 60's bungalow. The loft tank is about 7ft up. Sounds the same.

Its had a new boiler installed in the last five years and the roof tank looks fairly new. (black plastic type)

There is pipes everywhere in the roof. Its spaghetti junction

 

[houstonwehaveaproblem]

1 thing to cheak that can cause the taps to run dry after a while is that the open vent (the pipe that comes off cylinder at top and they "hooks" over the cold water tank in the loft) isnt in the water in the tank.

Could have been too long and water in tank risen due to faulty ball valve or whatever, so Cheak your open vent hasnt slipped or has been submerged into the water in your tank in loft, this will cause water to "dry up"

The pipe that hooks over the roof tank has about a 5 inch space between it and the water.

 

[seco services]

its either that horizontal or the one in the loft i would say.

i would say that any air coming from the cyl is not escaping as it should out of the vent pipe and over time getting stopping your flow due to the airlock.

may the horizontal in you loft has dropped down a inch or two towards the vent so the air won't go any further as air only gos up.


need a pic or measurments of the pipe in the loft how far to the t then to the vent etc.