thanks guys, i have 3/8th tubing and barbs, the fit is extremley tight without any kind of clamp. and the barbs have like a stepped pattern on them. jubilee clips would have to be very thin to get a good mate with the surface, like thinner than a mans wedding ring. i will check my hardware store
just found this
The humble cable tie (or zip tie) can make an effective and cheap hose clamp. Because of the low pressures involved in most water cooling setups it is not vital that hoses are clamped to industrial levels of pressure, and if you don't wish to purchase some specially made clamps, then a cable tie can usually let you get the job done with a minimum of fuss.
Cable ties are also useful for helping to straighten out kinks in hosing. Just tighten them firmly around the kinked hose area and they will help the hosing to hold its circular shape.
cable ties it is