Graphite yard · Chrome-edged edits · Free shipping over $80
Graphite yard · Tri-bay frame
Chrome bay Minimal four

Lochinvar & A.O. Smith 100110729 Prover Switch 320788-704 this sealed model provides a

SKU 9476324991
USD174.37 USD224.37
4.6

Pay in 4 interest-free payments of $43.59 Learn more

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 10 - Sep 15

Yard ledger

Chrome-bevel sheet on grid paper — specs and return notes filed under the bay.

Spec sheet
Description

this sealed model provides a rugged solution for maintaining low-temperature systems where lubricant breakdown is suspected

Balanced Port Construction: Prevents pressure drop fluctuations from impacting valve pin alignment for stable performance

Professionals value the 0-10 minute adjustable delay-on-break timer and 0-15 second fault interrogation delay

you may need to run an additional wire to the ground within the burner housing

Efficient Dehydration: High-grade molecular sieve beads maximize moisture removal from the liquid line

Lochinvar & A.O. Smith 100110729 Prover Switch 320788-704 this sealed model provides aThe Lochinvar & A. O. Smith 100110729 Prover Switch is a critical safety component designed for high efficiency condensing boilers and commercial water heaters. This OEM pressure switch serves as a blower prover, ensuring the combustion air blower is generating sufficient static pressure to safely vent flue gases before the ignition sequence begins. As the direct updated version for FS6679 1338, this part features a normally open contact configuration

Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy

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