Plastic to metal drainpipe adapters??

Hi All, I recently noticed that the exterior wall of my house is damp all the way down behind the drainpipe that comes down from the roof guttering. On closer inspection the guttering collecting the rain off of the roof is plastic half round stuff that feeds into an old metal downpipe which goes down the side of the house into the drains. The plastic gutter feed/outlet into the top of the metal pipe looks like its been bodged into the metal downpipe with about 12 tubes of sealant, the water is coming out of this joint and running down the outside of the pipe, hitting the brackets that hold the pipe to the wall and getting onto the wall. I want to replace the top half of the metal downpipe with plastic stuff so I was going to buy a new gutter outlet section and a 2 or 3 metre length of plastic downpipe. That will solve the leaking from the joint problem but then can I join the plastic downpipe to the metal one with a watertight seal. Is there a connector or something that would do this?? I would replace all of the metal pipe but it disappears into a jungle of a bush then into a concreted off section that I'd have to dig up presumably to get to the drain so I'm trying the easier option first. Thanks for any help or advice, Steve.

Reply to
steve573
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Bite the bullet & replace the lot. Otherwise its replacing one bodge with another. Hack the bush down & you will probably be able to get the metal pipe out without too much trouble.

Reply to
The Medway Handyman

You need to confirm the dimensions but if its 3" cast-iron pipe and a plastic gutter outlet for 68mm pvc pipe the plastic spigot should fit inside the cast-iron. Shouldn't need sealing in that case unless the downpipe is choked (likely). Anyway you can get proper adapters for 68mm pvc to 3" CI. eg BES p/n 12311 or just use the spigot of a pcv connector piece eg BES p/n

12308.

If the dimensions are different same principle but harder finding the parts. The secret is to avoid the need for sealing by running one one part into the next.

Jim A

Reply to
Jim Alexander

Is there a blockage causing it to back fill and run over?

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Reply to
John

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