Fitting unvented hot water cylinder

[oilydan]

21TonyK said:

oilydan said:

You need at least 22mm going to any more than 1 outlet, where it branches off to the tap you can have 15mm.

Most of mine was already done in 15mm and I could only run 1 tap at a time, until I installed the pumps.

Enlighten me about these pumps? We have lousy hot pressure on the first floor (conventional old school heating and water).

Are these pumps basically like a shower pump but for the whole hot water system, activated by the flow?

Just put one on the hot tank outlet and improved pressure all over?

Seems very simple...?

Yes.

For a vented cylinder you put it after the hot water tank. For cold, after the header tank.

I have an unvented cylinder and both pumps are in the loft at the header outlet.

Pumps I bought (Salamander 120) are 3.6 Bar and are 250 quid each. Great pressure.

I am not a plumber, BTW, so probably best to verify anything I say

[21TonyK]

oilydan said:

Yes.

For a vented cylinder you put it after the hot water tank. For cold, after the header tank.

I have an unvented cylinder and both pumps are in the loft at the header outlet.

Pumps I bought (Salamander 120) are 3.6 Bar and are 250 quid each. Great pressure.

I am not a plumber, BTW, so probably best to verify anything I say

Never seen them before

Definitely worth a couple of hundred to sort out them problem.

Cheers

[oilydan]

21TonyK said:

oilydan said:

Yes.

For a vented cylinder you put it after the hot water tank. For cold, after the header tank.

I have an unvented cylinder and both pumps are in the loft at the header outlet.

Pumps I bought (Salamander 120) are 3.6 Bar and are 250 quid each. Great pressure.

I am not a plumber, BTW, so probably best to verify anything I say

Never seen them before

Definitely worth a couple of hundred to sort out them problem.

Cheers

Bear in mind that, if you have a mixer tap, you will need to balance the pressure, otherwise the pumped water will end up pushing back on the unpumped. Or get a twin pump system, if the hot and cold lines are close together.