However, if your existing shower setup has a riser rail then chances are you will want to keep this and just fit your new shower mixer valve, but if not then go ahead and remove it. This is done by loosening and unscrewing the large nuts that secure the shower valve to the hot and cold water feeds. Most mixer valve coupling nuts the large nuts that attach the mixer to the supply pipes are 32mm, so using a 32mm open end spanner or adjustable wrench loosen the nuts anti clockwise.
Once you have loosened both nuts, with your spare hand hold the mixer valve tightly and then continue to undo both nuts. In the case of this shower, once the covers were removed there was a fair amount of black mould and the sealant had deteriorated quite a bit.
Due to this, all the black mould was cleaned up and the old sealant was removed and replaced with new to ensure it was sealed correctly and no leaks could occur. Before fitting your new shower valve flush the pipework through by holding a bucket over the ends of the hot and cold feeds and then turn them on at the mains and run for a few seconds. Using a second pair of hands is essential here.
Ask your assistant to hold a bucket over the ends of the supply pipes and one at a time, turn the water supply back on. Run it for a 5 seconds or so and any unwanted items lurking in the supply pipes should come out. Note : If this is an existing setup and the supply pipework is not new there should be no debris present.
However, if you do find any this may be a sign of issues so it might be a good idea to consult with a plumber. If they are, use a small screwdriver to prize them out. Before fixing the mixer valve in place, firstly screw on each pipe trim cover over each supply pipe.
Screw them up until they touch the wall and are pinch tight and then level and square them with a spirit level. Depending on your make and model, the small mesh filters will either be part of the seals or built into the mixer unit itself. Ensure each sits nice and flat against the body of the valve so that it seals properly. Position the mixer valve in place against each supply pipe.
The valve should now support itself. Finally, tighten each nut pinch tight using a flat open ended spanner. Do not use any spanners, pipe wrenches etc that have serrated jaws as this will damage the chrome plating.
When it comes to the term pinch tight , this can mean different things to different people but in general it means to tighten something by hand to the point that it feels tight and offers resistance without over straining yourself and then you give it one final pinch up with a spanner, wrench etc. The final pinch up will in most cases be no more than a full rotation of the object in question, sometimes just a half rotation if it feels as if a large amount of effort will be required to complete the full rotation.
Most riser rails and pipes are of a similar size especially if adjustable so you may be able to use the existing fixing points. To check, roughly assemble and position in place. Take note of where the fixing point on the wall is and the fixing slots in you riser rail or riser pipe bracket s. If you can use the existing fixings, great news! See our project on fixing to ceramic tiles here for details on how to do this. Check with a spirit level before marking.
Once the rail is in place you can then screw the shower head on to one end of the shower hose and then screw the other end on to the mixer valve. Tightening finger tight should be more than enough to create a good seal. Most riser rails feature a drencher head and also a small body wash attachment. Manage consent. Close Privacy Overview This website uses cookies to improve your experience while you navigate through the website.
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Exchange your items up to 90 days later. Rated 'Excellent' on Trustpilot. Bar Shower Valves A 'bar shower valve' is a specific type of exposed shower mixer valve that does not require recessing within the wall.
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