Gas restrictor pipe

[david]

When piping up a gas fire with 8mm restrictor tube do the connections have to be sealed with paste if so what's it called

[John Rumm]

Generally a sealing compound is used on threaded taper fittings. The "compound" can be a liquid/paste or a suitable (gas) PTFE tape. So if the restrictor tube includes a BSP taper fitting then a sealing compound is required.

(Note that gas fire pipework can be done using just compression fittings, and while one can use lubricating / sealing compounds on these, its not required).

Gas grade PTFE tape (similar to that used on water fittings but thicker) is the most common sealing material[1]. Alternatively a compound like Jet-lube V-2 Plus paste would be an example of another typical product.

[1] As specified in BS 6891, "Installation of low pressure gas pipework of up to 35 mm (R1 1/4) in domestic premises (2nd family gas) ? Specification"

[newshound]

Normally yellow PTFE tape, I think. (The reel, not the tape).

[Harry Bloomfield, Esq.]

It happens that newshound formulated :

Correct and white or blue for potable water.