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Just connecting hep2o fitting and just wondering if it needs a washer in the bottom? It does not come with a washer and the bottom seems tapered so I guess not but just thought i would ask anyway. TIA

Just a query really, why is there a Hep2o fitting 15mm to 3/4" female thread and not a 15mm to 3/4" male thread?

Morning all. I'm looking for standard PB water pipe: 10mm and 15mm. And I want Hep2O. Straight and coiled. You can't read this forum and disregard all the well-qualified advice. Yes, little bits of copper just in case @PeterW, @Onoff or @Nickfromwales turn up and look in the cupboards. Maybe my research hasn't been wide enough. Or careful enough. But I can't help but think that there's some confusion between barrier and standard Hep2O. Why, for example, does Screwfix only supply Barrier pipe (not available in the catalogue). Same with Toolstation Standard Pipe isn't listed. Why for example do local BMs appear to stock Barrier only? I am beginning to suspect that, yet again, local isn't best. Any suggestions for online suppliers? @Pete, @Triassic, @nod did you buy yours locally?

When I poured the slab (Passive) I put two 15mm pipes in for the H&C for the island unit. Due to a change in layout of the island unit I still need the pipes but they need to be longer so I either put in some 15mm straight connectors and continue the 15mm pipe or I can push through some 10mm inside the 15mm pipe that I already laid in the slab and have one continuous pipe right through to the base unit that will have the boiling water tap and tee for the DW so avoiding a connection under the island unit. I am doing a manifold system for the H &C system thus avoiding connections in inaccessible places so being anal what do I do. No great problem just be interested to see what people would do? TIA

After having had an eye watering quote for my plumbing I've decided to give it a shot myself. I will try and put into practice the advice I've read on this site and hopefully get some clarification on points I've not grasped... So I have almost finished the first fix having run most of my wastes to the stack. Also got all the HEP2O runs in for the radial plumbing system ready to feed the yet to be built HEP2O manifolds (10mm for WHBs and WCs, 15mm for rest), following in the footsteps of the Welsh 'master' @Nickfromwales, @jamiehamy et al I have 3 bathrooms and day to day DHW requirement is low but medium when visitors. Heating by 6kW ASHP to low temperature UFH, ground floor only. The system I have decided to go with is based on @JSHarris's model, but with a thermal store with mains pressure coil for DHW preheat going to external LPG gas water heater to top up the temperature. I know I will require a G3 plumber to fit the gas heater. I have no experience of plumbing and as I cannot solder my thinking is to use all compression fittings once away from the DHW & DCW HEP2O manifolds and for the heating side of things. Although with the amount of PTFE tape needed I might be better with HEP2O fittings! Might HEP2O fittings be more 'fool proof' than compression fittings? Here is my attempt at drawing the system up. I'm about to start ordering stuff so would really appreciate feedback, especially with regard to the 'thermal store'. That seems like a lot of antifreeze. Many thanks. Heating_DHW_Preheat.pdf

Hi All there has been a useful conversation over the merits of plastic pipe (HEP2O, Speedfit etc) in the following thread: Linky which triggered another question in my mind: What are the requirements for earth bonding where an install is primarily plastic? When and where should it be used?