Weil-MclainSKU: 690959

Weil-McLain® 633-900-130 Aquastat Thermostat Kit

$158.69
In stock (16)

The Weil-McLain® 633-900-130 is an OEM-spec aquastat thermostat kit for Plus 30-60 and Gold Plus/Ultra Plus 30-80 indirect-fired water heaters, regulating domestic hot water temperature via a drywell-mounted sensing bulb. The adjustable 90°F–160°F range lets techs dial in setpoint precisely to prevent short-cycling and nuisance calls tied to mismatched differentials. The kit includes the thermostat, and mounting screws — note it does not include a cover plate, so confirm that's on hand separately if replacing a damaged one. Professional installation required.

Shipping policy

Orders placed by 2:00pm EST will ship same day, except on holidays.

More Details

Product overview
  • Compatibility: Fits Weil-McLain Plus 30-60 and Gold Plus/Ultra Plus 30-80 indirect water heaters
  • Temperature range: Adjustable setpoint from 90°F to 160°F
  • Kit contents: Thermostat, control knob, mounting screws, and instructions - cover plate sold separately
  • OEM fit: Built to Weil-McLain factory specifications for a direct drywell swap
  • Application: Aquastat-style control for domestic hot water temperature regulation
  • Professional installation required
Specifications
Manufacturer Part Number 633900130
UPC 672619134287
Overall Dimensions n/a
Material n/a
Domestic or Import n/a
End Style n/a
Type n/a
ADA Compliance n/a
Warning Professional installation required
Standards and Approvals n/a
Resources
Delivery & Returns

Orders will ship same day if received by 2pm EST.

Upcoming holiday closures: July 3, 2026

All returns are inspected on receipt; credit is issued after condition is confirmed. Credit is issued only for items returned in original, saleable condition after inspection.

FINAL SALE ITEMS ARE NOT ELIGIBLE FOR RETURNS OR EXCHANGES.

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