Road Test of Stant vs. Shewman Thermostats

[Mart]

Many stats have a small indentation in the seat that the inner part seals against. This allows air to vent out and limits water leakage to an acceptable minimum.

Others have a small hole, others have a jiggle pin like pictured. Some have nothing.

Mart.

[Ross F-1]

Originally Posted by Mart

Many stats have a small indentation in the seat that the inner part seals against. This allows air to vent out and limits water leakage to an acceptable minimum.

Mart.

The Stants have a wavy edge in (I recall) 3 places to allow air to escape. If you hold them up to the light it's easy to see.

[Old Henry]

Originally Posted by Mart

Many stats have a small indentation in the seat that the inner part seals against. This allows air to vent out and limits water leakage to an acceptable minimum.

Others have a small hole, others have a jiggle pin like pictured. Some have nothing.

Mart.

Originally Posted by Ross F-1

The Stants have a wavy edge in (I recall) 3 places to allow air to escape. If you hold them up to the light it's easy to see.

I think I see one of those little "notches" you're talking about on the Stant on the right (the left one is a stock one with the jiggle pin). Wonder if they work? Might have skipped drilling the hole in mine. Good to know if I ever have to replace them.