Bypass driver's heater

[Twigg]

Originally Posted by Tyania

Thank you both. I was thinking about running them under the bus and you answered without even asking. I assumed that it could be a problem due to the debris but the pvc is an interesting solution.

Why do they use the tubing rather than hard metal pipe anyhow? burn risk? or risk of coolant cooling off in cold outside temps (good thing for engine... maybe bad on the way to the heater, I dont know)? Could I run hard pipe under the bus? I would be running the coolant a max of 8 feet from the driver/defrost heater to the rear. Perhaps only 4 feet depending on which bench seat I put it under.

I really dig the idea of putting it under the bus in hard and/or metal pipe. What exactly could I use???

Rigid lines need flexible couplings anyway, and copper/steel pipes spring leaks from time to time.

They buy the rubber hose by the mile, so it's probably cost-effective.

[Jolly Roger bus 223]

It's cheaper easier and quicker for the manufacturer and as TWIGG mentioned even ridgid pipe needs flexible connections.
There are many ways to go about the ridgid pipe and the flexible connections.
As well as thoughts and opinions.
When or if you decide to go that direction let us know and through the many opinions and your money base I am sure we can help with an workable option.
Have fun

[dan-fox]

By your sketch you are planning to run the 2 heaters in series. The one with the 5/8" fittings will surely restrict the flow to a lot less than the one with the 1" fittings is expecting to see. You might choke the existing bus heater if you put that small one in series.