Hydraulic Component For Clas ONE / Genus ONE - Ref. 65120137

Ariston boilers compatible with reference 65120137

Hydraulic group with reference 65120137. 36 verified compatibilities: Clas One 24 and Clas One 30.

Proven compatibility

Can't see your model or have questions? The printed reference takes precedence. How to check it · Send us a photo via WhatsApp.

How to check if ref. 65120137 is the part for your boiler

What determines it is not the boiler model, but the reference printed on the part you already have installed.

1. Find the reference printed on the installed part and check whether it matches the catalogue reference 65120137. If it is not visible, do not identify the part from its shape alone.
2. Check the full boiler model on its data plate and look for it in the model associations on this page.
3. Compare the connections and physical body with the original part before installation.
4. If anything is unclear, send us a photo of the marking via WhatsApp before placing your order.

Symptoms and faults that the hydraulic group 65120137 resolves.

The hydraulic group includes the valve, the by-pass, and the water connections. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The domestic hot water comes out at an irregular temperature, sometimes very hot and other times almost cold.

  Cause: This component regulates the flow of water between the heating circuit and the domestic hot water circuit. If it does not close properly, it mixes the two circuits.

  Check if the radiator heats up when requesting only domestic hot water; if it does, point to this part.

• 02

  There is a water leak at the bottom of the boiler, near the pipes.

  Cause: The seals of the hydraulic component wear out with cycles of heat and pressure and eventually lose their tightness.

  Dry the area and locate the exact point of the leak before replacing the entire part; sometimes it is enough to just change a gasket.

• 03

  The heating works fine, but the domestic hot water comes out with low pressure at the tap.

  Cause: The flow of water within the hydraulic component can be restricted by limescale or accumulated dirt.

  Check the water inlet filter and the network pressure before declaring the part faulty.

• 04

  You hear a noise or water vibration when you request domestic hot water.

  Cause: Turbulence caused by scale or internal wear of the hydraulic component generates noise as water flows through.

  Check if the noise disappears when cleaning the inlet filter; if it continues, it is more indicative of this part.

These symptoms can have more than one cause. If your boiler displays a fault code, send it to us via WhatsApp along with a photo of the labeling, and we'll tell you if this is the part.

Data sheet for the Ariston hydraulic group 65120137

Catalogue reference

65120137

Brand

Ariston

Type of part

Hydraulic units

Units in stock

5 units

Status

Refurbished

Warranty

1 year

Shipping

1-2 business days

Return

14 days

Manuals and technical documentation

Official documentation of the boiler, useful for locating the part and cross-referencing the fault codes.

• Ariston Clas One 35 Manual (PDF)Document © Ariston, provided as a technical reference.