Meertruck 1124AF

That is so cool! Did you use an AV step file as a basis or model it yourself?

We really would like a good 3D printer, but we are still saving for a CNC router to help with the buildout and just see that as more useful just now.
We based it on AV's solidworks model but remodeled it. The CNC router will be great for sure! If we build our truck here in Spain we can use our friend's, otherwise we may look into buying a kit.
 
Heard from AV last month that they should be able to get our truck in the workshop and build our box Oct-Dec. In the meantime, we've been planning out our plumbing.

This is the part-time-recirculating shower part of it:

recirc.png

The idea is for all the soap and grime to go away into the grey tank (~10L per shower) like with any normal shower, but then the remaining "luxury" part of the shower (if we want it) that's mostly clean water can be recirculated through some filters, a semi-clean tank, then a heat exchanger to top up the temperature, so we can stand under the hot shower for as long as we want without wasting additional water.

Then this semi-clean water can be re-used once later on for stuff like washing the dog, rinsing muddy boots, soaking dirty dishes, etc. Whatever we don't need to waste extensively filtered super clean water on. The semi-clean water can also be recirculated internally through the heat exchanger if we want to heat up those 20L.

We haven't seen it done quite like this before, but we're planning to order the main components soon to do some testing before finalizing for the truck.
 

Geo.Lander

Well-known member
Heard from AV last month that they should be able to get our truck in the workshop and build our box Oct-Dec. In the meantime, we've been planning out our plumbing.

This is the part-time-recirculating shower part of it:

View attachment 731444

The idea is for all the soap and grime to go away into the grey tank (~10L per shower) like with any normal shower, but then the remaining "luxury" part of the shower (if we want it) that's mostly clean water can be recirculated through some filters, a semi-clean tank, then a heat exchanger to top up the temperature, so we can stand under the hot shower for as long as we want without wasting additional water.

Then this semi-clean water can be re-used once later on for stuff like washing the dog, rinsing muddy boots, soaking dirty dishes, etc. Whatever we don't need to waste extensively filtered super clean water on. The semi-clean water can also be recirculated internally through the heat exchanger if we want to heat up those 20L.

We haven't seen it done quite like this before, but we're planning to order the main components soon to do some testing before finalizing for the truck.
That's really really interesting! I wonder what type of maintenance and lifetime you can expect to get from the filters. Obviously well though out design using a heat exchanger etc to keep the circuit isolated. I'm wondering how much thermal transfer can happen during fast circulation etc. Of course depends on the device itself. Keep us posted on the testing.
Personally I'm not using a single water filter hardlined into my truck for maintenance reasons. I know very elaborate water filtration is in vouge just now.. or is it just me?
 
That's really really interesting! I wonder what type of maintenance and lifetime you can expect to get from the filters. Obviously well though out design using a heat exchanger etc to keep the circuit isolated. I'm wondering how much thermal transfer can happen during fast circulation etc. Of course depends on the device itself. Keep us posted on the testing.
Personally I'm not using a single water filter hardlined into my truck for maintenance reasons. I know very elaborate water filtration is in vouge just now.. or is it just me?
We watched a ton of videos about recirculating showers in RVs and I think cleaning the filters can be every couple of weeks and replacing them every few months? But those are full time recirculating showers meaning they're dealing with soap and shampoo and whatnot which ours won't have to do, so ours should last longer. The pressure gauges on either side will helps us monitor the pressure drop so eventually we'll know what level of pressure drop means we should clean/replace the filters.

With the heat exchanger we haven't chosen a specific size/model yet but I've seen them used in hot water on demand systems so if if they can heat from room temp to shower temp then giving a little boost to already warm shower water should be easy.

Our drinking water filters won't be hardlined either; they'll be mounted on the front of the storage boxes that pull out from the garage hatch and we'll have quick connects for them. But each pump will need a pre-filter so I guess there's no way to get around that?
 

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