Hi Chris
I bet you are using 1/2 hose pipe first of all down to your local plumbing shop and get a 3/4 tank connector
Solvent weld type a gas shut off vale tell them what you want to do and I'm sure they will supply the bits
Do not buy this at a plumbers shop a flow rate will be to low Plastic float valve for inlet on wheelie bin
From a pressure washing supplier
<http://www.landypressurewashers.com/Landy_QuickCouplingsValvesAndFilters.html>
Most part is on the link above
Plastic float valve to inlet on wheelie bin 20 litres per minute+
Claw type hose barb quick connectors
Use a minimum 3/4 hose pipe preferably 1"" no more than 3 m in length
Like in the picture, when you open the valve you will get 15 litres in seconds
If it cant quite understand e-mail me and I'll e-mail you my number
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Can't upload pictures for some reason I have e-mailed them to you instead your website e-mail[/u]
mark@grimeforce.co.ukI have Upload a pictures herehttp://s1296.beta.photobucket.com/user/markbow2/media/IMG_28012_zpsd4e97ab3.jpg.html?sort=3&o=1