Twin tanking - Peugeot Boxer 350 LWB 2.5D - Minibus/camper/van

[Rotary-Motion]

HI

Why not just put a portable grey water waste container under the sink as long as its the same water content as the fresh water tank it will never overflow.This way no holes and just carry to water point to empty.Are you not putting seating in the van as you could make small box to contain gas bottle just fit a small calor one but remember to vent the floor in the box as gas is heavier than air it will fall to the floor

hi will

do you know i read this in the morning when i awoke and back then it read tottally differently muhahaha to what i am reading now must of been very tired...

but, good idea on the water catchment system, yeah not sure what i am doing with the gas bottle my initial concern was actually useing it under the worktop turned on and cooking, but yes it still has to be carried in transit somewhere which as you say must be vented...

i wasnt planning to build anything further except that one unit you see in the front of van, as i want to keep the van a van too for haulage of items if needed, and also i still have the seats so can be a minibus aswell, and also the camper or part camper i want to use it for...

im still in the planning stage so could change things round abit...

i could parttition a section on the right under sink maybe so it has its own section with the said vents in the floor?

[greasemonkey]

Tidy job, looking good.
I know who Peewee Herman was, and Ronald Mcdonald, but who the heck is TarQuin LaMont?

[Rotary-Motion]

Tidy job, looking good.
I know who Peewee Herman was, and Ronald Mcdonald, but who the heck is TarQuin LaMont?

alter ego name for facebook lol, thought it made me sound posh, hes a fictional character i made up...

[Rotary-Motion]

update...

chucked in a couple more bits of wood and small bit of piping, and with the piping i have a few questions...

the front panel i need to cut out doors and fridge hole and make a draw for knives and forks yet...

[Rotary-Motion]

[greasemonkey]

I don't think you would need to pump the tank water through the HE. Convection would take it round. What I would be concerned about is bacteria buildup in the water. It will be at exactly the right temperature for harmful bacteria to multiply, and not get hot enough to kill them.

[Rotary-Motion]

I don't think you would need to pump the tank water through the HE. Convection would take it round. What I would be concerned about is bacteria buildup in the water. It will be at exactly the right temperature for harmful bacteria to multiply, and not get hot enough to kill them.

so convection would work? and yes bacteria could be an issue, but only the same as a 60c water tank in a house you wash bath in brush teeth etc...

engine would be 80c/90c

[greasemonkey]

Thats true.

I can't see why convection shouldn't work. Keep the HE low, and have a short run of pipe, so its pushing it back into the top of the tank, rather than the hot water having to suck cold into the HE, if you see what I mean. I would have thought its bound to work. You could rig something up to test it, but its hardly worth it. If it fails, just plumb a small electric pump in.

[Rotary-Motion]

Thats true.

I can't see why convection shouldn't work. Keep the HE low, and have a short run of pipe, so its pushing it back into the top of the tank, rather than the hot water having to suck cold into the HE, if you see what I mean. I would have thought its bound to work. You could rig something up to test it, but its hardly worth it. If it fails, just plumb a small electric pump in.

cold water would need to be pulled from bottom to get hot to be passed back in a push pull me sort of thing going if no pump... and only convection?

also this leads me to another Q

i got the top pipe half way up the tank is this ok or should i go lower? as when tank emptys there will be no water level over this pipe so convection cant work?

edit = think i answered my own Q i need to pump it for when its low level water!!!

[Rotary-Motion]

ok update on system

added 2x soliniod valves, water pump one is on when engine coolant one is on (30 mins before journey end for hot water)

water pump one is needed in system as when (drinking water pump) is running it will suck air from this pipe (soliniod valve) through heat ex else!!!

also when 2x vavles on the screenwasher bottle pump will circulate SLOWLY to allow water to pass and get hot as possible with no cooling to HE or ENGINE temp.

engine coolant soliniod is needed as i dont want to drive round heating that water tank all the time, only when camping.

[K.H]

Thats getting complicated
ever heard of a thermos flask?

[Rotary-Motion]

Thats getting complicated
ever heard of a thermos flask?

this is my thermos 

i need soliniod on engine coolant as dont want tank heated all the time... needs to be able to shut off heat

main water pump has pressure switch built in = no pressure pump kicks in (energize soliniod), solinoid off pump is off...

this also gets complicated with the 12v as i want 2x soliniods off the main van battery and the water pump will be off the leisure battery, which both charge off the split charge system already installed, well not complicated just needs to be wired  that way, so van 12v doesnt cross to leisure 12v in any way! dont want 2x dead battery and stuck somewhere 

[greasemonkey]

I see what you mean.
Keep the screen wash pump, to circulate the water, but why not have the outlet and the inlet of the water tank right at the bottom? The hot water returning to the water tank will instantly rise to the top, and the cooler water stay at the bottom. You could do away with the solenoid valve then.

Your not heating a huge amount of water. I would have thought it will heat fairly quickly, just by heat transfer.

Or..... why not make up like a grid, out of a few strips of copper pipe, inlet and outlet coming out of the tank, and send the engine coolant around it, controlling it with a solenoid valve.

[Rotary-Motion]

I see what you mean.
Keep the screen wash pump, to circulate the water, but why not have the outlet and the inlet of the water tank right at the bottom? The hot water returning to the water tank will instantly rise to the top, and the cooler water stay at the bottom. You could do away with the solenoid valve then.

Your not heating a huge amount of water. I would have thought it will heat fairly quickly, just by heat transfer.

Or..... why not make up like a grid, out of a few strips of copper pipe, inlet and outlet coming out of the tank, and send the engine coolant around it, controlling it with a solenoid valve.

yes to keep both pipes loww if pumped!

and you got me thinking now do i need a HEAT EX ? just pipe some copper into tank and back out but water tight, would this be inefficent? and a heat ex do it quicker faster due to all those plates etc?

[Rotary-Motion]

GM look at latest pic i chnage dto 1 pump the main one now, what ya think?