Sykes Pickavant make a good one! pick them up on eBay too!

you can improvise by using a compressor set to about 3 bar and a modified screw top water cooling system! drill a hole to plum an adapter into the middle of the screw cap then pressure the system to about 45 50 psi using the gauge on the compressor then watch where the water comes out! DO not try pressuring to much as you can cause problems! I am sure somone else on here will be able to give you some more advice! If you are stuck to start PM me!

If in any doubt use some food colouring to make it a really strong colour! Remember to flush it all out!

good luck.