Mut Meccanica Tovo Anti Freeze 1 1/4 Inch Swivel

The Mut Meccanica Anti Freeze 1 1/4 Inch Swivel is an automatic anti‑freeze safety valve with a 1 1/4″ swivel union fitting and 1 1/4″ male BSP thread, designed to mount directly on the back of a compatible heat pump to protect the primary circuit from frost damage by discharging water as the system temperature approaches freezing.

Key Features

• 1 1/4″ swivel union connection – integrated 1 1/4″ union and 1 1/4″ male BSP thread allow direct, compact connection to suitable heat pump hydraulic ports without additional adaptors.
• Automatic freeze protection – opens automatically when the internal temperature element senses near‑freezing water in the primary circuit, dumping water to help prevent burst pipework and damage to the heat pump.
• Visual open indicator – built‑in visual indicator clearly shows when the valve has operated, helping installers and service engineers identify past frost events during inspection.
• Heat‑pump focused design – intended specifically for mounting on the rear of monobloc heat pumps, where external pipework and hydraulic components are most exposed to low ambient temperatures.
• Quality MUT manufacture – Italian‑made component from Mut Meccanica’s AF valve range, widely used in heating and renewable installations.

Technical Overview

• Product code: 7.030.03577 (Mut Meccanica Anti Freeze 1 1/4 Inch Swivel).
• Connections: 1 1/4″ swivel union with 1 1/4″ male BSP thread for direct mounting to suitable heat pump connections.
• Function: temperature‑sensing anti‑freeze discharge valve for water‑based or glycol‑mixed primary circuits on air‑to‑water heat pumps.
• Typical location: externally on the back of the heat pump casing, as close as possible to the primary flow and return ports to maximise protection.

Applications

• Monobloc air‑to‑water heat pumps – primary frost‑protection device for the external hydraulic block and exposed primary pipework on systems that may be vulnerable to freezing.
• Exposed primary circuits – suitable for installations with outdoor or partially exposed pipe runs where control‑based frost protection alone may be insufficient.
• Layered system protection – complements pipe insulation and inhibited glycol solutions to form a belt‑and‑braces approach on high‑value or critical systems.

Installation Notes

• Fit the valve directly to the heat pump using the 1 1/4″ swivel union, orienting the discharge so that any released water is safely directed to a drain or soak‑away.
• Route the discharge so that water and any resulting ice cannot create slip hazards, damage surfaces, or affect nearby equipment.
• Leave the visual indicator accessible and visible so its status can be checked easily during routine maintenance and fault‑finding.