hi got the thermostatic shower mixer for a combi with 15 mm fixings but what size pipes should i run to them 22 or 15 how will it affect the pressure ? should the bath pipes be 15 or 22 ?
hi
im re plumbing my bath and fitting a thermostatic mixer shower the bath currently has 22mm hot and 15mm cold is this ok also what should the shower be 22mm or 15mm it will run off mains cold and combi boiler :? :?
