Installing soil stack so it can come apart again easily?

[robodelfy]

Hi, I took off my very old soil stack with the intention of getting external wall insulation done. The company could do it in a few weeks which would be fine, but I just heard the news about grants in September for these kinds of jobs, and I'm on borrowed money so I feel it would be best to wait and attempt to get the grant.

The issue is my house is not usable without the soil stack! But I also know that the fittings can be almost impossible to get apart once on. I was thinking I can just put all the 40mm solvent weld fittings together dry, maybe with some gaffa tape. If they leak a bit its fine.

But the 110mm push fit fittings are near impossible to pull apart, (I've tried!)especially in situations where you need to be delicate because of what's going on internally.

Is there a solution to this, so I can fit it all now, but it would be easy to get apart in a few months when I get the work done? Could I use some sort of lubricant or grease that would still make it easy in a few months and then I could maybe clean it off?

Any ideas would be great
thanks

 

[Gasguru]

Many 40mm solvent fittings will not fit over the pipe until the solvent is applied, use compression for now?
Use silicon grease (the sprays are useless), round over the pipe-ends fully (I use a grinder with a diamond blade) and it should be easy fitting.

 

[robodelfy]

Many 40mm solvent fittings will not fit over the pipe until the solvent is applied, use compression for now?
Use silicon grease (the sprays are useless), round over the pipe-ends fully (I use a grinder with a diamond blade) and it should be easy fitting.

I've found the 40mm fitting go on and off fairly easily, the Floplast ones.

Will silicon grease still be effective a few months down the line?

 

[lostinthelight]

I have temperary loose fitted push fit without the seals in vertical position with some duct tape. The silicone liquid from Wickes stay slippery for quite a while if you have to use the seals, and its cheap.
Edit: its the 110mm I'm refering to

 

[robodelfy]

I have temperary loose fitted push fit without the seals in vertical position with some duct tape. The silicone liquid from Wickes stay slippery for quite a while if you have to use the seals, and its cheap.
Edit: its the 110mm I'm refering to

View attachment 198530

Ok, so you mean just putting the pipe in and its edge essentially rests on the rubber seal? I wonder if this could damage the rubber. The issue would be getting the strap bosses in the right places, as really I'm looking to have the final setup, but just be able to remove it for the insulation and render to go on in a few months

Maybe something like that silicon lube could work for a couple of months

 

[Gasguru]

Just use grease and fully insert the pipe ends (allowing for the correct expansion gaps). Chuck the spray in the bin where it belongs.

https://plasticsuppliesdirect.co.uk/polypipe-silicone-grease-bottle-100g.html etc

 

[robodelfy]

Just use grease and fully insert the pipe ends (allowing for the correct expansion gaps). Chuck the spray in the bin where it belongs.

https://plasticsuppliesdirect.co.uk/polypipe-silicone-grease-bottle-100g.html etc

Thanks, you are meant to leave an expansion gap with 110mm pipe, I didnt know this!