Saunier Duval Isofast C 28 E A Heating Expansion Vessel Ref. 05236600

Saunier Duval boilers compatible with reference 05236600

Expansion vessel with reference 05236600. 22 verified compatibilities: Isofast C 28 E and Isofast C 28 E1.

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. 05236600 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 05236600. 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 expansion vessel 05236600 resolves

The expansion vessel absorbs the expansion of water when heated. These are the typical symptoms and what to do:

Common symptoms and faults

• 01

  The pressure gauge of the boiler frequently loses pressure, and the circuit needs to be recharged often.

  Cause: The vessel has lost its nitrogen charge or has a leak, so it does not compensate for the expansion of the heating water and the circuit drops pressure on its own.

  With the boiler cold, knock on the vessel with your knuckles; if it sounds hollow equally on both halves, it has lost its precharge.

• 02

  The safety valve is leaking or discharging water when the heating is on.

  Cause: Without the air cushion in the expansion vessel, the pressure in the heating circuit rises too much and the gas valve opens to relieve it.

  Note the cold pressure and after 15 minutes of operation: if it rises significantly and does not drop, suspect the expansion vessel before the valve.

• 03

  There are noticeable knocks or noises in the pipes when starting or stopping the heating pump.

  Cause: Without the air cushion to dampen the pressure change, the shock is transmitted throughout the entire system.

  Bleed the air from the radiators and check that the pump is not set to a speed that is too high before attributing the noise to the expansion vessel.

• 04

  The pressure rises significantly as soon as the heating is started, even though it is within range when cold.

  Cause: It is typical of a broken membrane: the vessel stops acting as an air cushion and the circuit reacts as if it doesn't have one.

  With the boiler cold, check at the Schrader valve of the expansion vessel if water comes out when pressing the stem; if water comes out, the membrane is damaged.

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 Saunier Duval expansion vessel 05236600

Catalogue reference

05236600

Brand

Saunier Duval

Type of part

Expansion vessels

Units in stock

6 units

Status

Refurbished

Warranty

1 year

Shipping

Delivery time shown at checkout

Return

14 days