Making a grey tank out of aluminum?Making progress on the welding. I bought a new box of flap disks, which makes my welds look a lot better.
I test fitted the sink and cooktop, They are a nice tight fit, and should sit almost perfectly flush. It will be great to have a flat surface to work on.
The grey tank parts shipped, so I should have those next week. Hopefully my welding skills will have improved enough to make that a easier task. I set up the tank with 50% overlap external fillet welds. Which should be easier to make water tight.
Might try a welding aluminum couplings and running PEX through strain reliefs / bulkhead fittings vs. welding an aluminum pipe into the tank....worst case scenario with PEX is the strain relief/ bulkhead fitting may leak but PEX it is 100X more durable and easy to repair.Getting my butt into gear as the self imposed deadline is 34 days out. Drafted up a gray water tank. Two integral baffles, and a 1/2" OD aluminum heating pipe will be built in. The plan is to route my hydronic heating loop with a secondary pump to keep the gray tank and lines from freezing in the winter.
View attachment 601910
Here is where it will be mounted.
The shower pan is bonded down. I need to trim the edges and install the drain line.
They are an option, and I am looking at some automotive options I can adapt.We use solenoid control valves in our radiant installs, why not use those?
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I didn't think they drew that much? They are only powered when the loop is calling for heat.They are an option, and I am looking at some automotive options I can adapt.
The first issue is power consumption, those valves can use 2A+ at 12V. The second is size, space and connections. I am trying to keep the package size down, and reduce the amount of plumbing I need to do.
The thermostat on the outlet also lets me set the loop temperature. The advantage of that, is that I can have warmer coolant going to the grey tank, and cooler for the drain hoses. Getting the hose size and restriction right to avoid unnecessary heating can be a challenge on a setup like this.
Space under the van is at a premium, as is interior space. I don't want to give up a bunch of storage for pumps and valves. I also don't want to heat up tanks/lines every time I want a hot shower either.