Plumbing, Tools & Home Improvement, Water Pumps, Parts & Accessories
Honeywell TK30030 4.4‑Gallon Expansion Tank, 1/2″ NPT
$97.16 on Amazon.com (as of October 20, 2026, 6:42 AM EST) View details ↗
The Honeywell TK30030 is a 4.4‑gallon expansion tank engineered for residential hydronic heating systems. Built to withstand temperatures up to 240 °F, it provides reliable pressure control and an airtight cushion to protect your boiler and piping.
Featuring a 1/2 in. NPT male connection and a 100 psi pressure rating, this tank integrates easily into existing installations while delivering consistent performance. Its robust construction ensures long‑term durability for home heating applications.
| Capacity | 4.4 Gallon |
|---|---|
| Pressure Rating | 100 PSI |
| Temperature Rating | 240 °F |
| Connection Size | 1/2 in. NPT Male |
What type of heating system is this expansion tank designed for?
It is intended for residential hydronic heating systems.
Is the 1/2 in. NPT male connection compatible with standard boiler fittings?
Yes, the 1/2 in. NPT male thread matches common residential boiler connections.
