Frequently Asked Questions

HFT Pipestoppers Pancake Inflatable Stoppers

1.0 How do I know when to choose between a Mechanical and an Inflatable Stopper?

HFT Pipestoppers® Inflatable Stoppers can be inserted and retracted through holes smaller than the one to be sealed. They are much less expensive than Mechanical Stoppers, but are not so suitable for applications requiring the ruggedness and strength of a Mechanical Stopper. 

2.0 How do I prevent the stoppers from being pushed out of the pipe during a pressure test?

It is common to brace the ends of pipes to prevent stoppers sliding out. The Pipestoppers® Division of Huntingdon Fusion Techniques HFT® can provide further data.

3.0 What is the maximum temperature range for the Low Profile Stoppers?

The recommended maximum temperature for this standard range is 80ºC (176ºF). 

4.0 What is the size range for Low Profile Stoppers?

The size range is 6 - 88" (152 - 2,235 mm). 

5.0 How do I inflate the Stoppers?

Each Stopper is designed and fitted with a standard Schrader value, which will attach to any foot pump or compressor. 


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