PVC Pipe Tanks

Dave,
Have you done the maths on using PVC pipe as far as water capacity is concerned?
It works out at about 7.8 litres per metre of pipe length.

I considered using PVC on an earlier vehicle (tray back Landrover) of mine but found that I could fit a caravan water tank of about 55-60 litre capacity under the tray into the same space. The tank was only 150mm deep and fitted between the tray crossmembers directly behind the cab.
The filler and outlet system the same fittings as used in a caravan.
I found it quite easy to mount onto the vehicle from underneath but it was a bit awkward working on my back to do it.

Google 'caravan water tanks ' to find out the sizes available

Hope this helps.

Disco
aka Tony

G'day Dave S, I made a 2.4m x 150mm tank using sewer grade pvc tube, sealing the ends with glued on threaded fittings for screw on end caps. Short piece of 20mm pvc tube with glued on threaded end fittings for attaching to water tank and screwing on cap. Suction hose from van hand pump draws water from thr tank and filling is by using a funnel. It holds about 50L. Your 2.4m x 100mm tanks would hold about 2/3 this amount or about 34L. It cost me about $100.00 in materials for the 50L tank. I would rather have been able to use plastic jerry cans but the pvc tank was necessary to fit on the floor of a 8x5 trailer along the side of the slide on. Don't skimp on materials, your tanks are in for a rough ride.