gate valve verses ball valve

[julesandtash]

rubbers in the jp pushfit expands and leaks, used it when pumping out the bio, leaked after just a few batches

Best option is to use brass compression fittings on JG Speedfit or Hep20 pipe.

[BANDIT2]

Agreed, and don't forget inserts

[Tony]

Yes sorry I should have mentioned that the hep2o that I've used successfully for bio transfer for years is all plumbed in with brass compression fittings + pipe inserts.  I really don't see a problem with it's use for transfer and settle tanks and things like that, in fact I plan to use it extensively on my new settle tank arrangement.

One chap I know used it for part of his processor main loop pipework, despite my misgivings it seems to have survived over a year - not sure I'd be that happy dewatering at 105C with it though!

[willbuild]

it is rated to 92c but will withstand up to 114c for short periods. If connecting to a copper cylinder then use 1 meter of copper pipe because of residual heat.
Well that's what the manufacture says.

[BANDIT2]

It survives well in veg too, I made a heater coil out of it and use it to warm up my veg settling tank for glyc washing and the like.
plumbed into my boiler circuit with by pass valves.