How do puddle flanges work

It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.

The pros usually waterproof under the screed simply because of their timeframes. They need to get on with it and don't want to be waiting for a screed to dry out.

Slide the nut with the back end going onto the pipe. Slide the compression ring onto the pipe. Push the fitting into pipe until the butt end. What is a puddle flange? It also provides easy access for cleaning, inspection or modification. Flanges are usually welded or screwed. Flanged joints are made by bolting together two flanges with a gasket between them to provide a seal.

The pros usually waterproof under the screed simply because of their timeframes. They need to get on with it and don't want to be waiting for a screed to dry out. Slide the nut with the back end going onto the pipe. Slide the compression ring onto the pipe.

Push the fitting into pipe until the butt end. Join your peers on the Internet's largest technical engineering professional community.

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I am examining an application where a pipe running through an underground pit has a puddle flange joining the pipes within the pit wall.

My understanding is that the puddle flange will prevent the passage of liquid from one side of the wall to the other external to the pipe. However a colleague of mine has suggested that depending on the welding of parts of the flange, it's purpose is to prevent wall cracking in the event of pipe movement. I'd appreciate if somebody could give me a definition, or tell me if a puddle flange serves more than one purpose.

Thanks in advance Philbob.