Filling gap around 110mm waste pipe where it passes through wall

rubble2

As per the title really. I had to break away the mortar surrounding the 110 mm waste pipe where it exits the wall due to having to repair a leak on the joint.

This has now been done and I am looking to make good, the mortar is a red/brown colour and I have been trying unsuccessfully to find a cost effective way of matching the mortar colour for such a small amount.

I am probably overthinking this but would an option be to use standard grey mortar - let it dry, and then attach one of these pipe collars -https://www.talon.co.uk/products/pipe-collars/110mm-pipe-collars/black-110mm-4-pipe-collar -over the mortar using black silicon sealant?.

Any other practical alternatives you can suggest would be most welcome. Thanks

stuart45

That would work.

Murmansk

I think you might indeed be overthinking it! Buy a bag of mortar for about £2 and use it as it is - the fact it's not red won't really be noticeable and it'll be mostly hidden by the pipe

Section62

rubble2 said:

I am probably overthinking this but would an option be to use standard grey mortar - let it dry, and then attach one of these pipe collars -https://www.talon.co.uk/products/pipe-collars/110mm-pipe-collars/black-110mm-4-pipe-collar -over the mortar using black silicon sealant?.

I'm not sure that would work - they are designed for use on plain 110mm diameter pipes.  The hole in the centre is a true circle.

The branch pipe connector on a 110mm 'T' is unlikely to have a true circular cross-section at the point where it passes into the wall - the branch should have a swept bend, which means if you take a vertical section through the pipe at that point it won't be circular.

I think (but could be wrong) that the collar won't fit snuggly around the branch pipe at that point and at that angle - so you'll need to bodge it with silicone which won't look that good.

A cheap way to colour mortar is to mix in a bit of tile or brick dust.  Soft red bricks will yield red dust just by scraping them.  Harder ones can be drilled if you have a reasonably powerful electric drill.  Then just mix some of the dust into the mortar mix - allowing for the dry finished colour to be lighter than when it is wet.

FreeBear

Section62 said: A cheap way to colour mortar is to mix in a bit of tile or brick dust.  Soft red bricks will yield red dust just by scraping them.  Harder ones can be drilled if you have a reasonably powerful electric drill.  Then just mix some of the dust into the mortar mix - allowing for the dry finished colour to be lighter than when it is wet.

And as you only need the outermost layer to be coloured, the bulk of the infill can be any old colour. I'd put some squirty expanding foam in the gap to reduce the amount of mortar needed and cut back on the amount of cement used.

stuart45

Section62 said:

rubble2 said:

I am probably overthinking this but would an option be to use standard grey mortar - let it dry, and then attach one of these pipe collars -https://www.talon.co.uk/products/pipe-collars/110mm-pipe-collars/black-110mm-4-pipe-collar -over the mortar using black silicon sealant?.

I think (but could be wrong) that the collar won't fit snuggly around the branch pipe at that point and at that angle - so you'll need to bodge it with silicone which won't look that good.

You aren't wrong, as it probably won't clip together properly as they are designed really for internal use. It could look a bit of a bodge if not done carefully.

GDB2222

You can get red mortar dye. 

GDB2222

This stuff.

https://www.toolstation.com/everbuild-208-powder-mortar-tone-1kg/p48790

It comes in 1kg tins, and you will need around 10g.

Bendy_House

https://www.screwfix.com/p/pipesnug-110mm-cover-black/399gx

And, if you cannot/don't want to remove the fittings to slip this on, just slice through the rubber collar diagonally.