Caleffi 573012A Backflow Preventer and AutoFill Combination 1/2" FPT W/Gauge

Caleffi 520516AX

Caleffi 551028A Air Separator 1" Sweat DISCAL
The DISCAL air separator is used to continuously remove the air contained in the hydronic circuits of heating and cooling systems. The air discharge capacity of these devices is very high. They are capable of removing automatically all the air present in the system down to micro-bubble level. The circulation of fully de-aerated water enables the equipment to operate under optimum conditions, free from any noise, corrosion, localized overheating or mechanical damage. Micro-bubbles, fusing with each other, increase in volume (get larger) until they become large enough to rise to the top where they are automatically released.

Caleffi 551004A

Caleffi 573002A Auto Fill Pre-Adjustable Automatic Combination Fill Valve, Brass Pre-Adjustable Automatic Combination Fill Valve and Backflow Preventer, 1/2" FPT,
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Caleffi 553549A

Caleffi 573403A Dual Check Backflow Preventer W/Atmospheric Vent 1/2" NPT
Dual check backflow preventer with atmospheric vent
Dual union for easy servicing and testing Protects potable water systems from backflow of contaminated fluids
Technical data

Maximum operating pressure: 175 psi

Medium temperature range: 32  210 °F

Material: DZR low lead brass

Caleffi 573007A

Caleffi 546307AM Air Separator

Caleffi 546306AM

Caleffi 553549A AutoFill Filling Valve 1/2" Sweat x NPT
The automatic filling valve is a device consisting of a pressure reducing valve with compensating seat, visual system pressure setting indicator, an inlet filter, anti-scale internal parts, a shut-off valve and a check valve. It is installed on the water inlet piping in sealed heating systems, and its main function is to maintain the pressure of the system stable at a set value, automatically filling up with water as required. This valve has been designed as pre-adjustable, which means that it can be adjusted at the required pressure value before the system charging phase. After installation, during the filling or topping-off phase, the water feed will stop when the set pressure is reached filling 50% faster than other valves. There are no levers to flip or valve to close. Pre-assembled with the 573 series backflow preventer, the AutoFill Combo features an atmospheric vent which is designed to protect drinking water systems from return flow, caused by back-siphoning or back pressure, of contaminated fluids. The 573 series has been specifically certified to standards CSA B64.3 and ASSE 1012.

Caleffi 551028A

Caleffi 546306AM Air Separator

Calefaction HGT 30

Caleffi Discal 59829 Replacement Air Vent Assembly for Discal Brass 551 Series (Except Compact)

• Straight body style

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Caleffi 502710A

Caleffi 680504A PEX Manifold 1/2" Fitting

• Compatible with PEX Pipe
• Compatible with stainless steel clamp & Copper Crimp ring systems,
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  BMI Fittings CR34T