Tips for Boiler Installations with Condensate Removal Pumps: Use Clear PVC Pipe for the Whole Discharge Installation


Many installers, when installing condensing boilers and condensate removal pumps, use 22mm hard plastic pipe. After all, it is the standard used for most plumbing installations. However, it can often complicate pump discharge pipe runs.

For example, for vertical discharge, installers often combine the softer clear PVC pipe supplied with a condensate removal pump and then connect it to hard plastic pipe/rigid pipe for the horizontal run.

During the horizontal run of such installations, there are often a series of bends with the hard plastic pipe, and this can create issues such as air lock and increased operating noise/vibration.

Furthermore, installers sometimes install the clear pipe inside the rigid pipe. This again causes similar problems when bends appear in the horizontal rigid pipe and kink the clear PVC pipe inside.

A simple and effective installation solution is to use the clear PVC pipe for the whole vertical and horizontal installation.  

Depending on the installation environment, three installation methods are recommended using clear PVC throughout the installation.  

One method is to have the clear PVC pipe going directly up from the pump and having the final termination point above the pump. A second method is to have the clear PVC pipe go below the pump but having the termination point above the pump. In both instances, no anti-siphon accessories are needed.

A third method is to have the clear PVC pipe go below the pump and discharge below the pump. If the final termination point of the pump discharge pipe runs below the level of the condensate pump then a Sauermann Drain Safe Device should be installed above the pump. This will prevent air from returning into the pump and creating further issues.

Accessories can also be used to make the bends and a self-sealing waste adaptor gives a simple termination point.

Pumps; Boilers; Installation; Tips

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