I am trying to source some thin wall plastic piping to act as a protective sleeve where other piping passes through brick and blockwork walls.
The holes I have laboriously bored are 51mm dia.
2" solvent waste pipe from Wickes is too big. Somewhere I got the idea that push fit and solvent pipe have different diameters.Can anyone kindly tell me what I should be searching for?
The back up plan is to run the circular saw down the cut off lengths but I'll wait to be properly informed:-)
What size are the pipes you want to protect.
Vacuum cleaner extension tubes (metal or plastic) are OD? 32mm or 35mm depending on model. Ebay has generic products in both sizes/materials.
Example
Metal may have a thinner wall
The white waste pipe purchased from Wickes that I have is in two sizes
40mm OD and 34mm OD, wall thickness approx 2mm
Lots:-) 28mm boiler flow and return, 22mm soft water supply to distribution point, 15mm hot supply to utility area and wet room.
These will all be thermally insulated and I want to continue this through the walls to also give protection from expansion abrasion.
Travis Perkins stock *2"* push fit so I may try measuring the O/D before purchase.
>In message , Tim Lamb writes
Ah! This looks like the answer:-)
You may be better off, say, sleeving a 22mm pipe with a OD 34mm pipe and filling the gaps with an expanding foam rather than trying to push an already insulated pipe through a larger pipe. You could even have one size of sleeve (35 or 40mm) for all pipe sizes and have different thickness of expanding foam to hold the pipe in place.
I'm bookmarking that for future reference --- thanks!
I just assumed he meant he would continue the insulation through the walls using expanding foam.
That's what I'd do - but I don't usually sleeve waste pipes through walls, possibly as I tend to overdrill the holes so there's minimal if any pipe-wall contact. Maybe I should?
The other thing I have done is to wrap a bit of plastic DPM (heavy gauge plastic) around the pipe and foam it in, but that also works better if the hole is over sized. That still allows the pipe to move slightly and be removed if needed.
For the copper (which I always do sleeve as copper is thin and less tolerant to abrasion) is to use electrical conduit (25mm for the 15mm pipes)
Two inches is the bore and you need to add the wall thickness to that to get the OD. Solvent weld white waste pipe is 56mm OD and push fit is
54mm OD.
Push fit turns out to be closely related to ephemera:-(
Nobody actually stocks the larger sizes.
54 mm would be too tight anyway where I have drilled through plywood timber frame. Core drills in block are usually well oversize.Back to option 1. Oh maths:-( circ. = pi x D?
I need to take 15 or so mm out or overlap the cut....
The job is done! More time spent punching waste out of the core drill than drilling:-(
50mm solvent weld pipe with about 14mm cut down the length does the job nicely.One trick I discovered... the pipe is keen to maintain the original shape so I tried strips of tape to control this. Unsurprisingly, plastic tape stretches but paper masking tape does not!
Very satisfying to cut the tape with a blade and watch the pipe expand into the hole.
What is the OD of Floplast WS03?
It's quoted as 50mm but not sure if that is the OD? Going by most other waste pipe sizes it will be the OD.
Screwfix stock it.
Jobs done, Fred. In fact splitting an oversize pipe does a better job because it is able to expand and grip the inside of the hole.
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