I figure there must be a simple way to replace this piping, possibly with a shorter length. Is this just a standard size? I have no experience with plumbing really, but I know how to switch the water off and drain the pipe enough to perform this. Plus I like knowing that I've done something!
One final question - all my pipes have this odd white stringy substance around it (the actual pipes and nut threads) - presumably to make the join tighter. What is this substance?
I would agree that the pipe is badly kinked and maybe removing the kinks could improve the water flow. These flexible pipes only come in standard lengths, and it is unlikely you will find a shorter one.
Normally if the pipe is too long, it can be coiled into a spiral (as if making a spring) to effectively shorten it without affecting the flow. This may not entirely solve your problem as the kinked pipe may be damaged and not recover if straightened. Also, the bore of these pipes is usually quite small, and may restrict the flow to the tap anyway.
The white stringy stuff you refer to is PTFE tape, and is used to seal joints by winding it around the threads before installation. It is only necessary when the thread is the seal itself and not on compression joints and those with rubber seals such as I can see in your photo. Non of those require the use of PTFE.
You could just shorten the copper pipe and re-connect the flexi hose - as if the flexi was straight and not kinked the tap would probably work fine.
Probably PTFE tape this helps form a watertight seal and should be wrapped in a clockwise around the olive of the joint. Available from any DIY shop, eg Wickes very cheap and effective if used correctly.
Thanks for your replies guys! Yeah the kink is definitely affecting the flow - if you wiggle the tubing the flow increases/decreases!
I can only shorten the pipe running to the tap, as the main hot water pipe goes to a T fitting just outside the picture I took. But I don't know if that would work as the diameter of the pipe changes nearer the tap.
I might see where the 'T' section pipe is going. I've got a feeling its going to where my washing machine is. If its just blanked off I may as well just get rid of that pipe. I have a cold fill machine anyway. That way I guess I could just shorten the pipe therefore lengthening the distance between the pipe and tap. Not sure if that make sense.
I'm really not sure why they even used a flexi-hose. It really wouldn't be a big deal to have a copper pipe straight up! If only I could solder pipes...
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