Tiny - it makes a minor difference with the Ranco temp control valve - the factory install results in the incoming hot water being shut off where it enters the core rather than where it leaves, and allows the temp sensing tube to control the Ranco properly

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot