Continuous improvement in our pump ranges

Watson-Marlow operates a policy of continuous product improvement. As new models are introduced, old models are phased out. This guide makes clear which models have been discontinued, and what is the recommended replacement.

The following list refers only to drives. The pumphead shown should not be considered. The pumps pictured are representative and not necessarily a specific model.

Discontinued model Replacement model
 101 - 101U/R, 101F/R  120 range of laboratory pumps
101 - 101U/R, 101F/R

 120 range of laboratory pumps

Discontinued model Replacement model
 313  300 series of science and laboratory pumps
313 - 313F/D, 313S/D, 313U/D, 313T/D

300 series of science and laboratory pumps

 

Discontinued model Replacement model
401 - 401U/D1 401U/DM2 401U/DM3 100 series of laboratory pumps
401 - 401U/D1 401U/DM2 401U/DM3

100 series of laboratory pumps

Discontinued model Replacement model
 504  500 series Nema 4X (IP66)

504 - 504S/RL, 504S/RL2, 504S/L, 504S/D, 504U/RL 504S/RL2, 504U/L, 504U/D, 504Du/RL 504Du/RL2 504Du/L 504Du/D

500 series Nema 4X (IP66) washdown pumps

Discontinued model Replacement model
 505S  500 series Nema 2 (IP31)
505S 505S/RL 505S/L 505S/D, 505U/RL, 505U/L 505U/D, 505Du/RL, 505Du/L, 505Du/D

500 series Nema 2 (IP31) process pumps

Discontinued model Replacement model
 505Dz  323 range of science and laboratory pumps

 505Dz - 505Dz/RL

323 range of  science and laboratory pumps

Discontinued model Replacement model
 503  521

503 - 503P/RL, 503P/RL2, 503P/L, 503P/D

521 range of close coupled pumps

Discontinued model Replacement model
 501  521 range of close coupled pumps

501 Close-coupled 501F/RL, 501DF/RL, 501I/RL, 501TI/RL, 501DV/RL

521 range of close coupled pumps

Discontinued model Replacement model
 501 baseplate  521 range of close coupled pumps
501 baseplate - 501FB/R, 501VB/R, 501DFB/R,
501DVB/R

521 range of close coupled pumps

Discontinued model Replacement model
 623S  620 range of Nema 2 (IP66) process pumps
623S - 623S/R

620 range of NEMA 2

(IP31) process pumps

Discontinued model Replacement model
 624  620 range of Nema 2 (IP66) process pumps

624 - 624S/R, 624S/RE, 624S/L
624U 624U/R 624U/RE 624U/L

620 range of NEMA 4X (IP66) process pumps

Discontinued model Replacement model
 624  620 range of industrial pumps
624 - 624Di/R, 624Di/RE, 624Di/L

620 range of industrial process pumps

Discontinued model Replacement model
 603P  
603P - 603P/R, 603P/L

 621 range of close coupled pumps

Discontinued model Replacement model
 601 baseplate  621 range of close coupled pumps
601 baseplate  - 601FB/R 601VB/R
601DFB/R 601DVB/R

621 range of close coupled pumps

Discontinued model Replacement model
 601 close-coupled  621 range of close coupled pumps
601 Close-coupled - 601F/R, 601DF/R,
601I/R 601TI/R 601 DV/R

621 range of close coupled pumps

Discontinued model Replacement model
 701  700 series high flow process pumps
701 - 701S/R, 701S/RE, 701U/R, 701U/RE, 704S/R 704S/RE, 704U/R, 704U/RE

 700 series high flow process pumps

Discontinued model Replacement model
 Bredel SP  Bredel SPX
Bredel SP

 Bredel series

The following list refers only to pumpheads. The pumps pictured are representative.

Discontinued model Replacement model
 202  200 series
202 - 202AA 202BA

 200 series multi-channel pumps

Discontinued model Replacement model
 501  520 range of mid flow process pumps
501 - 501RL, 501RL2

520 range of mid flow process pumps

You get more:
520R2 pumphead is designed to take up to 9.6 bore x 2.4 wall tube. 520R uses 1.6 wall tube
Larger track radius enables more flow at same speed as 501RL, resulting in longer tube life
Tougher guard with improved snap-shut, tool-unlocking latch
More chemically resistant
Roller bearings for better long-term occlusion reliability 

Discontinued model Replacement model
 601R  600 series mid flow process pumps
601R

600 series mid flow process pumps 

The 620R pumphead has a snap-shut, tool-unlockable front guard
Accepts all the same size continuous tubes as the 601R. Easier tube loading and more positive tube retaining

The 620R and 620RE are not retro-fittable to a close-coupled or cased drive manufactured for the 601R pumphead

Find out more about the Watson-Marlow range

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    For help or advice please contact us on:

    Tel: 1 978 658 6168 and Toll free 1 800 282-8823

    You can also send us an email or find your nearest distributor