shower pump

[nabby68]

You did run a seperate cold feed directly from the tank to the pump?

yes, in 22mm

Does the ballvalve keep the water level fairly level when the shower running ?

If it dosn`t it may be not enough head of water to supply the pump when the level drops

The cylinder is constantly topped up from the tank in the loft so no air will get in...only cold water (ready to be heated)

i did monitor the water level in the header tank as the pump was running and it stayed almost full the whole time

 

[nabby68]

any help please

 

[nabby68]

pretty please

 

[nabby68]

bump

 

[Rob]

ok, im not a great at plumbing but you seem desperate.

When you say struggling how do you mean? noises etc

 

[nabby68]

thanks for your help, when i say "struggling" i mean it makes a noise to suggest that the pump is trying to work to hard ie, not enough water entering it

 

[nabby68]

are there any expert plumbers out there who can help please

 

[scaby]

how high are the feed pipes for your pump in relation to the cold water tank? do they rise almost to the to the water level ? what is the height difference between the highest pipe and water level?

 

[wonderb0y]

have you tried ringing the technical support of the pumps manufacturor, cos if youve done everything as it should be then it could be just the pump thats faulty?

 

[nabby68]

how high are the feed pipes for your pump in relation to the cold water tank? do they rise almost to the to the water level ? what is the height difference between the highest pipe and water level?

the hot feed for the pump rises from the HWC up into the loft and rises slightly above the level of the pump and the connects to the flexi hose on the pump. The pump is on the floor of the loft which is about 500mm below the level of water in the header tank

have you tried ringing the technical support of the pumps manufacturor, cos if youve done everything as it should be then it could be just the pump thats faulty?

the only thing they suggest to do is include an anti-gravity loop, whic i would not be able to physically do because of the space constraints in my airing cupboard where the HWC is situated.

 

[Gasguru]

I though you had a combi boiler setup in your house?

What is the make and model of the pump.

Have you set the hot water temperature to no more than 60 Centigrade.

Are you complying with the minimum distance from pump to top of water level in the cold tank?

Not using speedfit are you?

 

[nabby68]

I though you had a combi boiler setup in your house?

What is the make and model of the pump.

Have you set the hot water temperature to no more than 60 Centigrade.

Are you complying with the minimum distance from pump to top of water level in the cold tank?

Not using speedfit are you?

1. not got a combi set up, dont think i ever said i did have
2. it is a watermill 1.5 bar pump
3. i have just checked and my hot water is set to 70 c so i have reduced that and will try like that in the morning when i heat my HWC up. Do you think the temp being to high would cause the problems i suggest?
4. i have used some speed fit connections on pipework or was you referring to the connections to the hoses leading from the pump?
thanks for your help

 

[Balenza]

The no stop essex flange is the best option to provide minimal aeration of the hot supply to the pump and an anti-gravity loop (AGL) must be installed also in situations where the pump is sited above the hot outlet from the cylinder.

 

[nabby68]

The no stop essex flange is the best option to provide minimal aeration of the hot supply to the pump and an anti-gravity loop (AGL) must be installed also in situations where the pump is sited above the hot outlet from the cylinder.

thanks balenza
ok, but i though a surrey flange would be a lot easier for me to fit and a is this not adequate? and what does an anti-gravity loop do? and would a non-return valve on the hot feed to the pump do the same thing?

 

[Balenza]

nabby68 wrote

thanks balenza
ok, but i though a surrey flange would be a lot easier for me to fit and a is this not adequate?

Are you certain you have it connected correctly ?

and what does an anti-gravity loop do?

It limits aeration of the hot supply to the pump.

and would a non-return valve on the hot feed to the pump do the same thing?

Read the MI,s. It states " Do not fit non-return valves in the inlet line to the pump. The pump must be able to vent back to the supply tank".
It would also provide a flow restriction and probably interfere with the initiation and smooth operation of th pump and possibly risk internal mechanical damage.