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Hey I'm wanting to take a reducer out of a polyplumb tee I have got can I take the reducer out of the branch. A put the inners ( grab ringer washer and o ring) from a 22mm polyplumb elbow in the branch and connect to 22mm?

think il need to buy one of the polyplumb component kits with the spare inners for the fittings

what do you do then just unscew it and leave the grab ring etc on the pipe and put the new fitting on taking out oll the inners first?

hey, are polyplumb fittings demountable like the old blue hep20 fittings were. If you have put a fitting on a section of pipe can you unscrew the old fitting and put a new fitting on tht section of pipe.

does it still not matter if the flow and return are to different sides of the raditor if its a zoned heating system? With two zones as long as there's a zone valve on the flow as it spilts off to the different zones.

So as long as i get a flow and return to each raditor it doesn't matter what sides there on aslong as I use biodirectional rad valves?

Does every radiator need the flow on the same side for it to work properly?

when installing central heating and runing the flow and return pipework to pick up the various different radiators. Does it matter if say one raditor has the flow on the left hand side of the rad. and another with the flow on the right hand side?