Hoffman 401479 – Air Vent for Hot Water Heating, No. 790
Hoffman 790 water vent valve, 1/8″NPT male straight shank, 30lb maximum, for removal of air from convectors, baseboard and wall radiation.
Original price was: $176.00.$100.00Current price is: $100.00.
Hoffman 401479 – Air Vent for Hot Water Heating, No. 790
Hoffman 790 water vent valve, 1/8″NPT male straight shank, 30lb maximum, for removal of air from convectors, baseboard and wall radiation.

Hoffman 401479 – Air Vent for Hot Water Heating, No. 790
Hoffman 790 water vent valve, 1/8″NPT male straight shank, 30lb maximum, for removal of air from convectors, baseboard and wall radiation.
| Weight | 1 lbs |
|---|---|
| Dimensions | 4 × 1 × 1 in |
| Manufacturer (Brand) | Hoffman Specialty |
|---|---|
| Model | 790 |
| MPN | 401479 |
| UPC (GTIN) | N/A |
| Weight | 0.3000 |

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Frequently asked questions
Inline Sales & Services Ltd. specializes in hydronic pumps, pump systems, parts, and related solutions for commercial, industrial, and HVAC applications. We provide sales, service, and technical support to customers throughout British Columbia and across Canada.
We are located in Surrey, British Columbia, and serve customers locally in the Lower Mainland as well as nationwide.
Yes. We ship pumps, parts, and equipment anywhere in Canada. Shipping options and timelines vary depending on product availability and destination.
We supply a wide range of pumps, including:
Hydronic pumps
Circulation pumps
Inline pumps
End suction pumps
Booster pumps
HVAC and mechanical system pumps
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Yes. We carry and source a wide selection of pump parts, including seals, bearings, impellers, motors, and gaskets. If we don’t have a part in stock, we can usually source it quickly.
Yes. Inline Sales & Services Ltd. has extensive experience with Bell & Gossett pumps and replacement parts, including repairs and upgrades.
Absolutely. Our knowledgeable team can help you identify the correct pump or part based on your system requirements, model numbers, or application details.
Yes. We provide professional pump repair and service solutions for many makes and models. Our goal is to restore performance, extend equipment life, and minimize downtime.
You can place an order by contacting us directly by phone or email. Our team will confirm availability, pricing, and shipping details.
You can reach us by phone or email, or by using the contact form on our website. We’re happy to answer questions, provide quotes, or assist with technical inquiries.

Hoffman Specialty, a unit of ITT Industries (Xylem), offers a wide range of products for steam and hydronic systems. From steam traps to valves, from boiler feed units to temperature regulators and vacuum breakers, whether residential or commercial, Hoffman Specialty can fill the requirement. Hoffman Specialty was founded in 1913 by George D. Hoffman with the introduction of the Hoffman No. 1 Automatic Siphon Air Vent Valve for steam radiators, and was acquired by ITT Industries in 1970.