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The McDonnell & Miller MM 310451 paddle kit is a replacement paddle assembly for FS4 and FS8 float switches, designated MM FS4-15SS. It serves as a replacement or upgrade paddle for hydronic float switch applications and is identified by catalog number 310451 and product ID 750693. The model designation indicates a 15 size and suggests stainless-steel construction for the paddle.
Replacement paddle kit for FS4/FS8 float switches; 15 size; stainless-steel paddle
We pulled together the parts most installs need for this unit, plus a few add-ons worth a look. Check what you need — nothing here blocks checkout.
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