Temporary fixing of plastic pipe

[dgadee]

I want to use a plastic 40mm waste pipe to run wiring along in the cockpit locker. I want it up under the deck. How do I get the pipe to stay in place so that I can put some fibreglass fastenings in place? I just tried CT1 but the grab is no good, or I am not using it properly.

 

[KevinV]

Wedge it?

 

[Tranona]

Suggest using masking tape to hold it up while the CT1 cures or use a "grab" adhesive Choice here screwfix.com/c/sealants-adhesives/grab-adhesives/cat850076 You may find you don't need to glass in at all.

 

[dunedin]

Gaffer tape?

 

[justanothersailboat]

Power Grab 'n' Bond. It's like thicker, stickier sikaflex. Same sort of cartridge-gun tube. DIY stores.

 

[dgadee]

Tried tape. The problem with fast grab is that it's not fast grab enough - or perhaps I wasn't holding it in place for long enough. Never really had much luck with that stuff.

I might have to wedge it in with battens.

 

[justanothersailboat]

CT1 is more flowing than Power Grab 'n' bond and so, as you say, there can be time for the pipe to fall. Put all my ceiling battens on with PGB as well as electrical conduit where the self-adhesive backing wasn't enough (following the curve of the hull side). Doesn't need holding for long.

 

[flaming]

Sounds like a job for a P-clip to me. Wouldn't even need the fibreglass then.

 

[dgadee]

Sounds like a job for a P-clip to me. Wouldn't even need the fibreglass then.

I think there will be about 6 cables going along this - 240v arctic cable, 2 x solar 6mm, 2 x power/network to autohelms, rear nav light.

 

[flaming]

I think there will be about 6 cables going along this - 240v arctic cable, 2 x solar 6mm, 2 x power/network to autohelms, rear nav light.

P-clips are available in sizes to suit holding a 40mm pipe in place. If your cables fit in that pipe, then they'll certainly do the job of holding that pipe where you want it.

 

[dgadee]

P-clips are available in sizes to suit holding a 40mm pipe in place. If your cables fit in that pipe, then they'll certainly do the job of holding that pipe where you want it.

Might work. Can't remember if there is just a single fibreglass layer there. Might be in which case screws would come through. Will take a look. But will get Power Grab 'n' bond first. Pity Screwfix (a few minutes away) doesn't do it.

 

[justanothersailboat]

If your boat is new enough the fibreglass is very consistent in thickness and you can use very short screws. If it's old enough to be from the "made by a man with a bucket of resin" era it may not be. And that's how I ended up with a row of evenly spaced tiny point repairs that don't quite blend in, on only one side of my coachroof gelcoat. oops.

ps really hope the pgb works for you and is not too much trouble to get.

 

[dgadee]

If your boat is new enough the fibreglass is very consistent in thickness and you can use very short screws. If it's old enough to be from the "made by a man with a bucket of resin" era it may not be. And that's how I ended up with a row of evenly spaced tiny point repairs that don't quite blend in, on only one side of my coachroof gelcoat. oops.

ps really hope the pgb works for you and is not too much trouble to get.

It's a Fulmar. Old technology.

 

[MontyMariner]

Hot glue gun might hold the pipe in place.

 

[Boater Sam]

Why a round pipe when proper trunking has a flat back which will work much better with a grab adhesive?

 

[penberth3]

Sounds like a job for a P-clip to me. Wouldn't even need the fibreglass then.

If its 40mm waste pipe why not use 40mm waste pipe clips? Surely the easiest things to find, and the cheapest.

 

[flaming]

If its 40mm waste pipe why not use 40mm waste pipe clips? Surely the easiest things to find, and the cheapest.
View attachment 209318

Mostly because I don't make them.....

@dgadee if you want some P-clips and can't find any PM me your address and I'll stick some in the post.

 

[dgadee]

If its 40mm waste pipe why not use 40mm waste pipe clips? Surely the easiest things to find, and the cheapest.
View attachment 209318

Screws through the gel coat in the cockpit.

 

[dgadee]

Why a round pipe when proper trunking has a flat back which will work much better with a grab adhesive?

I never thought of proper trunking. Looking now I can see that it is mostly 22mm. Too tight for my needs.

 

[KompetentKrew]

I never thought of proper trunking. Looking now I can see that it is mostly 22mm. Too tight for my needs.

You can easily get whatever size you need from the local electrical factor or DIY store. E.g https://www.amazon.co.uk/dp/B0FQK2K99S

I think you will prefer proper trunking if it approaches capacity or you ever need to replace it.