Pvc pipe for water on isuzu dmax

Further to that, the use of two or four 90 degree bends and same length or a bit more to form a closed loop tank of pipe will see the slosh factor halved and a more compact storage possible. Then it can be placed in a more convenient position and still have a cap for filling etc, and may fit in a roof basket if required.

just done a quick calculation volume of a cyclinder using your dimension of 150mm diameter and 2.000mts long multiple that by 2 as well as the same diameter x 1200mm the width approx. by 2 is a volume of 103.020litres. that's 100kg of water dancing around your roof rack, plus the weight of pipe and fittings. All my storm water pipes at home on the shed are 150mm dia due to the surface area. This will still not be a cheap exercise in the purchase of pipe and fittings etc. Should you go down this path, I would put circular baffles in the pipe to slow down the movement of water from side to side and back and forth. Just think of a cattle truck with cattle dancing around on the decks.,a bloody nightmare, or horses in a horse trailer. That is what you can expect. This is why all your tankers have separate cells, and baffles within those cells to slow down this movement.

With the water carried on the inside of the 150mm pipe, the diameter being 144mm with a 3mm wall thickness means a total of 2m length is around/close to, 32 litres of water. If straight or in a side by side loop, it is very much the same volume.
So using the outside measurement/dia is probably not the ideal way of calculating.
(7.2cm x7.2) x 3.142 = 162.88 x 200cm = 32.6 L capacity, rounding applied.


90mm pipe is 86mm ID, 2mm wall.

that's for the correction RMD. As someone suggested doing a full loop as I understood around the rook rack, using approx. 1200mm for side length, My assumption was an approximate figure based on a rough length not specified length. Still a lot of water high up. Pending on his travel route an numbers in vechile, 10ltr containers for the supermarket may be a good option. Your calculation is for only one length of pipe as I see it. Multiple that by 2 for side by side pipes gives you 65litre splus the 180bends and "T". if I am correct. Please correct me as I was only doing a rough calculation

G’day Garry
Yes I can see your info was for a big 4 sided tank. I agree it is far too much weight to go to that total length. In an accident it would promptly leave the vehicle. Shocks would need to be in excellent order to control the mass wandering around up there, OE shock would struggle and it would be like driving a wet sponge.

The black would, though, increase the absorbtion of heat into the water. If you want to drink it, that'd be a problem. If you want to wash with it, possibly a benefit.

Easily solved, decant what's needed in the morning when cool for drinking and keep where you generally keep your drinking water.

Keep in mind sewer pipe is not made from food grade plastic if you intend using it for potable water

AlbyNSW, I think you will find storm water pipe is ok to use for drinking water, as that is what is used where people have to rely on rainwater tanks for their water supply.

Macca.

PVC pipe is not the best for storing drinking water - Poly Vinyl Chloride does leach into the water. use it for washing and showering and use something else for drinking. I have a 90mm PVC rectangular tank circumnavigating my roofrack on a GQ - gives me around 35 litres but would only drink it if desperate. (I used to be in the plastics industry)

Macca I think it is a bit different when used as stormwater pipe collecting rainwater as the water is not stored in the pipe,it only travels through it briefly.
A bit like the taste of drinking water from a garden hose left lying in the sun compared to after you flush it through for a minute before drinking it .

AlbyNSW, not necessarily, it depends on how it is set up. Not all down pipes run directly off the roof to the tank, some run along or under the ground for some distance before emptying into the tank. The water contained in these long runs may sit there for several days or even weeks between rainfall events.

Macca.

Macca,Alby, Yep, it is ok but we can't change the fact that PolyVinylChlorides do leach into the water they are linked to a few forms of cancer, but you have to remember that very few people who install water tanks have your long term health on their list of priorities when designing and installing the plumbing. $$$$? Even though the risk is probably small, like a lot of things we encounter in life eg dust, fumes, other carcinogens etc they take a long time to affect your health or kill you ...but eventually they may - even if they only shave a few years off your potential lifespan but then you'd never know what the real cause of your demise was - if any of the above... Just saying... ;-)