







🔥 Stay cool under pressure with Watts ETX-30 – the expansion tank that means business!
The Watts ETX-30 is a 4.5-gallon, precharged expansion tank designed for closed loop hydronic heating and cooling systems. Built with durable alloy steel and a flexible diaphragm, it controls thermal expansion and maintains system pressure up to 75 psi and temperatures up to 240°F. Compatible with glycol systems and featuring a compact design with a 1/2 inch MNPT connection, it supports a wide range of heating applications from baseboards to radiators.









| Manufacturer | Watts | 
| Part Number | ETX-30 | 
| Product Dimensions | 27.43 x 28.19 x 37.59 cm; 3.63 kg | 
| Item model number | ETX-30 | 
| Material | Alloy Steel | 
| Wattage | 30 watts | 
| Item Package Quantity | 1 | 
| Included Components | Expansion Tank | 
| Batteries included? | No | 
| Batteries Required? | No | 
| Item Weight | 3.63 kg | 
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