Filling Key Extender Cointra Edyco ED 21 EI
Refurbished Cointra Filling valves

Filling Key Extender Cointra Edyco ED 21 EI

If you are unable to add water when trying to fill the heating circuit or notice that it is continuously leaking or allowing water to pass through, a technical diagnosis must confirm whether you need the Prolongador Llave Llenado Cointra Edyco ED 21 EI. This part allows you to replenish water in the heating circuit to recover the appropriate pressure. It is installed in boilers from the ED range, such as the ED-21 model, as well as in other models from the SP, SPA, SPC, and SPI ranges, among others. A technician must confirm through diagnosis whether it is necessary to replace it if faults or leaks affecting the system pressure are present.

Type of part
Filling valves
Status
Refurbished
internal SKU
PLLED21EI
Warranty
1 year
VAT included Stock · 6 units
Compatibility

Compatible Cointra boilers

Filling key. Ten verified compatibilities: 21 EI and ED-21.

Verified compatibility

Boiler modelFamilyVerification
Cointra 21 EIEDVerified
Cointra ED-21EDYCOVerified
Cointra 21 EISPVerified
Cointra 21 ISPVerified
Cointra 24 ISPVerified
Cointra 27 EISPVerified
Cointra 27 EISPAVerified
Cointra 21 EISPCVerified
Cointra 21 EISPIVerified
Cointra COMPACT SPC 21 EISUPRAVerified

Can't see your model or have questions? The printed reference takes precedence. How to check it ·

Guide

How to check if it is the part for your boiler

The part reference, model, and equipment revision must be verified against the manufacturer's documentation.

  1. Find the reference printed on the installed part and check whether it matches the catalogue reference —. If it is not visible, do not identify the part by 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.
Diagnosis and fault codes

Symptoms that require diagnosis in the filling valve

The filling valve allows water to refill the heating circuit. These are the typical symptoms and what to do:

Common symptoms and faults

  • 01

    I can't turn the filling key because it's hidden among the pipes.

    Cause: Without the extension, the original key is too short or misaligned to be used by hand.

    Measure the available space and the diameter of your key's stem before purchasing to ensure that the extension fits.

  • 02

    The extension has broken and left a piece inside, or it has been lost.

    Cause: It is a plastic part that wears out with use and can become brittle over time.

    Check that the filling valve turns correctly with pliers, to rule out that the problem is with the valve and not the extension.

  • 03

    I cannot fill the heating circuit because I cannot open the filling valve.

    Cause: The extender allows the valve to be operated by hand in installations where it is recessed or very close to the wall.

    First, check if the problem is due to space or if the valve is stuck, as the extension will not solve a valve that does not turn.

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.

Technical data

Cointra filling key data sheet

Uniclima internal SKU
PLLED21EI
Brand
Cointra
Type of part
Filling valves
Units in stock
6 units
Status
Refurbished
Warranty
1 year
Shipping
Delivery time shown at checkout
Return
14 days

Part data and available documentation

Contrast the label codes, PCB, and revision with the installed part; they are not necessarily equivalent references.

Material/color
Blue plastic
Documentation

Manuals and technical documentation

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

Frequently asked questions

Frequently asked questions about the filling valve

Is this extension suitable for the boiler SP 24 I?
Yes, the SP 24 I is on the list of compatible boilers.
Is this extension compatible with the SUPRA COMPACT SPC 21 EI?
Yes, it appears on the list of compatible boilers.
What fault indicates that the extender needs to be replaced in the SPI 21 EI?
It should be checked when the extension is broken or lost and does not allow the filling valve to be operated. Replacement requires a technical diagnosis.
Delivery calculated by destination Delivery time shown at checkout
1-year warranty inspected and tested
14-day return uninstalled parts
Technical support we verify your model
Filling Key Extender Cointra Edyco ED 21 EI