wrote:

Hi guys, thanks for your reply. Apparently, there is a Warwick/Warwix
(I've seen both spellings) flange to let me fit above the tank, simply

These are basically the same as a surrey flange. They fit into the boss
at the top of the cylinder and provide two outlets. One intenede for the
non pumped HW that comes from the side, and a second intended for the
pump feed that comes from the centre tube at the top which ensures this
water is taken from a couple of inches down from the top of the tank and
hopefully away from any air.

by replacing the vent pipe from the top of the tank. To me, this is
preferable for 2 reasons: first, I don't like the idea of cutting into
the tank; second, I haven't really got the space to fit it anywhere
else.

Yup - if you don't have an essex flange already fitted (many modern
cylinders come with them factory fitted and blanked off) this is a
simpler way to go.

The challenge I have over the piping is this: I have 2 feeds on the
pump, 1 in 1 out. I run the inlet pipe to the in side of the pump and
I run the outlet to the original feed entry of the tank (I'm looking to
boost pressure throughout the house, primarily to a large washing
machine). Where does the vent line go? Sorry if I'm appearing dense,
but this has definitely got me confused.

So you are not planning to use the side connection of the flange for
feeding unmpumed hot water anywhere then? If so you can connect this to
the vent pipe, and then feed the pump from the top connection on the
flange. Feed the output of the pump into the remainder of the pipe that
used to come from the top of the cylinder (and had the vent on it)

I need the prv because I already have a power shower fitted and the
extra pressure will blow the seals in it.

Could you not feed this from the side connection of the flange along
with the vent connection?


--
Cheers,

John.

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