[DeTomaso] heater hose ball cock valve question

[MikeLDrew at aol.com]

In a message dated 7/25/11 19 57 57, boyd411 at gmail.com writes:


> When placing a ballcock valve in the heater hose at the fire wall do you 
> use
> two ball cock valves (1 for each hose) or only one valve on the heater 
> hose
> going in to the fire wall?
> 

Although only one is strictly necessary (blocking the flow of water into 
the car, not suction back to the engine), tech regulations require two, just 
for added security.

Mike