Buffer tanks...

**Laser** · 2nd May 2012, 17:58

Hi,

We are currently in need in a lighter buffer tank, at the moment we are using a 20oz co2 bottle with a modified pin valve (thanks Will for telling us how to do it) and I was wondering what else we could use.

I saw that the big nipper team were using modified camping bottle that they got pressurised, so that may be an option, but personally I would like a bigger Buffer tank. So I was thinking of a foam fire extinguisher.

Does anyone know what the imput thread is on the bottle?

**jonny** · 2nd May 2012, 18:44

1. go down to your local scrap yard
2. pick up a large quantity of old foam fire extinguishers for about a quid each, avoid rusty ones
3. atleast one of them should have a thread close enough to a standard bsp thread for it to work, jam a fitting in and araldite in place

tips: bring a 1/2 bsp fitting with you and compare the od of where the valve enters the cylinder to the 1/2. this will give you a good idea if the extinguisher will be suitable. also avoid the really cheap disposable ones (easy to spot, they have plastic valves) as there is no screw part in them.