heat exchanger replacement

The heat exchangers below are 1:1 replacements for the GEA WTT GBS300H

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 GEA WTT GBS300H-10

GEA WTT GBS300H-10 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 GEA WTT GBS300H-14

GEA WTT GBS300H-14 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 GEA WTT GBS300H-20

GEA WTT GBS300H-20 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 GEA WTT GBS300H-24

GEA WTT GBS300H-24 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 GEA WTT GBS300H-30

GEA WTT GBS300H-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 GEA WTT GBS300H-34

GEA WTT GBS300H-34 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 GEA WTT GBS300H-40

GEA WTT GBS300H-40 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 GEA WTT GBS300H-44

GEA WTT GBS300H-44 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 GEA WTT GBS300H-50

GEA WTT GBS300H-50 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

The UNEX PB5 is the compact 1:1 replacement for the GEA WTT GBS300H. The port-to-port dimensions are identical (120 × 73 mm) and the PB5 has a combi connection: 22.35 mm solder or G1" male thread. One port, in other words, which you either solder or connect by thread — exactly as your installation requires. It is a brazed plate heat exchanger with plates of AISI 316L stainless steel, copper brazed, available from 10 to 50 plates. Choose the version with the same plate count as your current GBS300H; a GEA WTT GBS300H-20, for example, is replaced by the PB5H-20. For this compact series too, the replacement takes the exact place of your current exchanger. Some versions are in stock in Oosterhout (the Netherlands), the rest are quickly available on request. Look up your type number in the table above and request a no-obligation quote; you will receive our quotation within one working day. You can of course also call: +31 (0)162 429 068.

Frequently asked questions about replacing the GEA WTT GBS300H

Will the UNEX PB5 fit my GEA WTT GBS300H 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 GEA WTT GBS300H 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 GEA WTT GBS300H.

What does it cost to replace a GEA WTT GBS300H?

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