Adjustable Spunding Valve / PRV for Unitank Fermenters

Adjustable Spunding Valve / PRV for Unitank Fermenters

Precise Pressure Control for Fermentation & Carbonation

Upgrade your Unitank fermenter with our premium adjustable spunding valve, designed for precise pressure control and built-in safety. This compact, all-stainless steel valve allows you to maintain pressure during fermentation and naturally carbonate your beer — all while protecting your tank with an integrated pressure relief valve. Built for professional-level performance and effortless operation, it’s the perfect solution for both advanced homebrewers and small craft breweries.

Made entirely from 304 stainless steel — no internal plastic parts.
Adjustable from 0–2 bar (0–29 psi) using a knurled knob for quick, accurate tuning.
Maintains steady fermentation pressure and enables natural carbonation.
Integrated PRV automatically vents excess pressure to ensure safety.
Fits all standard 1.5″ tri-clamp PRV ports.
Tool-free design — no disassembly required for use or cleaning.
Compact and easy to sanitize between batches.

Why Use an Adjustable Spunding Valve?

Fermenting under pressure reduces esters and unwanted flavors during warm fermentations. It accelerates lagering and allows you to carbonate your beer naturally — without the need for forced CO₂. This valve gives you full control over your fermentation environment, while the built-in PRV keeps your tank safe at all times.

Spunding above 15 psi? The Unitank ships with a 15 psi PRV that is factory set and adjustable with an Allen key. Raise it to suit, and keep every setting below the tank’s 30 psi working pressure.