Keep your hydronic wood boiler running safely and efficiently with premium valves from Altheatsupply. Our collection covers every flow‑control need—from fast‑acting ball valves and back‑flow‑stopping check valves to temperature‑balancing mixing valves, code‑required pressure & temperature relief valves, and zone valves for multi‑loop systems. Each component is built to handle the high temperatures, ash, and glycol mixes common in wood‑fired heating, so you can count on drip‑free seals, smooth operation, and long service life. Browse below to find the right valve for your installation or retrofit and enjoy consistent, energy‑saving heat all season long.

Ball Valves – Fast, Positive Shut‑Off

Ball valves install on supply and return lines of a wood boiler, giving you instant, quarter‑turn isolation for maintenance, drain‑downs, or system balancing. Full‑port designs minimize flow restriction, protecting pump performance and maximizing BTU delivery.

Check Valves – Stop Reverse Flow

Inline check valves sit after the circulator pump to prevent back‑siphoning when the pump cycles off, guarding against ghost flow that can overheat dormant zones. Their stainless or brass internals resist boiler‑water corrosion for dependable one‑way operation.

Mixing Valves – Stable Supply Temperatures

Pressure & Temperature Relief Valves – Safety First

Mounted in the boiler’s top tapping, P&T relief valves automatically vent excess pressure (typically 30 psi) or temperatures above 210 °F, preventing dangerous over‑pressurization or steam flashes. Code‑compliant brass bodies and stainless springs ensure fail‑safe protection.

Zone Valves – Independent Heat Control

Zone valves divide your hydronic network into individual loops—living area, garage, domestic hot‑water tank—opening only when a thermostat calls for heat. This targeted flow control reduces fuel consumption and evens out room temperatures across the home.