heat exchanger replacement

The heat exchangers below are 1:1 replacements for the Funke GPL4

Fits directly without modifying your pipework — delivered quickly from our own stock.

Installer or service company?

Installers and service companies order from their own net price list once their business account has been approved.

Request a business account
UNEX PB5H-10 — replacement for Funke GPL 4-10-H-30

Funke GPL 4-10-H-30 can be replaced by UNEX PB5H-10

UNEX PB5H-10

Available on request

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-14 — replacement for Funke GPL 4-14-H-30

Funke GPL 4-14-H-30 can be replaced by UNEX PB5H-14

UNEX PB5H-14

In stock — fast delivery

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-20 — replacement for Funke GPL 4-20-H-30

Funke GPL 4-20-H-30 can be replaced by UNEX PB5H-20

UNEX PB5H-20

On order

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-24 — replacement for Funke GPL 4-24-H-30

Funke GPL 4-24-H-30 can be replaced by UNEX PB5H-24

UNEX PB5H-24

Available on request

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-30 — replacement for Funke GPL 4-30-H-30

Funke GPL 4-30-H-30 can be replaced by UNEX PB5H-30

UNEX PB5H-30

On order

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-34 — replacement for Funke GPL 4-34-H-30

Funke GPL 4-34-H-30 can be replaced by UNEX PB5H-34

UNEX PB5H-34

Available on request

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-40 — replacement for Funke GPL 4-40-H-30

Funke GPL 4-40-H-30 can be replaced by UNEX PB5H-40

UNEX PB5H-40

In stock — fast delivery

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-44 — replacement for Funke GPL 4-44-H-30

Funke GPL 4-44-H-30 can be replaced by UNEX PB5H-44

UNEX PB5H-44

Available on request

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

UNEX PB5H-50 — replacement for Funke GPL 4-50-H-30

Funke GPL 4-50-H-30 can be replaced by UNEX PB5H-50

UNEX PB5H-50

In stock — fast delivery

1:1: same port-to-port dimensions (120 × 73 mm) and connection 22,35 mm solder or G1" external thread

If your Funke GPL4 fails or is nearing the end of its service life, you want to act quickly. The UNEX PB5 is the 1:1 alternative: identical port-to-port dimensions (120 × 73 mm) and the same combi connection of 22.35 mm solder or G1" male thread. One port, two mounting options — you solder or screw, whichever your installation requires, and the pipework remains unchanged. The PB5 is a brazed plate heat exchanger with plates of AISI 316L stainless steel, copper brazed. Available from 10 to 50 plates; choose the plate count of your current GPL4. A Funke GPL 4-30-H-30, for example, corresponds to the PB5H-30. Some versions are in stock in our warehouse in Oosterhout (the Netherlands); the rest are quickly available on request. In the table above you can see the correct replacement for each type number. Unsure about the right version, or would you like a price straight away? Call +31 (0)162 429 068 or request a no-obligation quote; you will have a quotation in your mailbox within one working day.

Frequently asked questions about replacing the Funke GPL4

Will the UNEX PB5 fit my Funke GPL4 without modifications?

Yes. The replacement has the same port-to-port dimensions (120 × 73 mm) and the same connections (22,35 mm solder, G1" external thread), so the existing pipework does not need to be modified.

Is the replacement for the Funke GPL4 available from stock?

3 of the 9 versions are in stock in our warehouse in Oosterhout, the Netherlands, and are delivered quickly. The other versions are available on request.

Which plate counts are available?

The replacements are available from 10 to 50 plates, in 9 versions. Choose the version with the same plate count as your current Funke GPL4.

What does it cost to replace a Funke GPL4?

Request a no-obligation quote; you will receive pricing within one working day. Call us for expert advice: +31 (0)162 429 068.

Heat exchanger news, once a month

New series, replacement options and technical articles. No offers, no drip campaigns.

You will first receive a confirmation email. How we handle your data is described in our privacy policy.

HEXCHANGE
Contact form

Response within one working day

+31 (0)162 429 068

On working days from 8:30 to 17:00

sales@hexchange.eu

Response within one working day

Heat exchanger news, once a month

New series, replacement options and technical articles. No offers, no drip campaigns.

You will first receive a confirmation email. How we handle your data is described in our privacy policy.

Customer service

HEXCHANGE

De Wetering 24

4906 CT Oosterhout

the Netherlands

VAT: NL852912407B01

Copyright © 2026 All rights reserved by HEXCHANGE