Why do RWO and Deckma part numbers change?

Manufacturers update part numbers when equipment designs evolve, manufacturing processes change, or components are superseded with improved versions.

Will a new part number fit my old equipment?

Yes. New parts maintain the same form, fit, and function. New parts are backward compatible with equipment using old part numbers.

Part number cross-reference guide

Instantly cross-reference old to new part numbers for RWO and Deckma marine equipment

Finding the correct RWO or Deckma spare part can be challenging when part numbers change. This comprehensive cross-reference guide helps you identify current part numbers from old reference codes, Pos. numbers, or equipment models. With over 400 genuine parts cataloged, you can quickly find the exact component you need for your RWO oily water separator, sewage treatment plant, or Deckma bilge alarm system.

Quick Benefits:

✅ Cross-reference 400+ RWO and Deckma parts
✅ Search by old part number, Pos. number, or equipment model
✅ Covers OWS-COM, CS-BIO* (soon), OMD, and AEP pump parts
✅ Updated with latest growing list of RWO and Deckma part numbers
✅ Fast quotations from N&P Maritime Singapore

How to use this part number reference

Start with what you have. Choose a route to the current part number.

I have an old part numberOld number → current number → quotationExplore ＋

Find your old number in Table 1.
Read the New PN and check the description.
Send the current part number for a quotation.

Go to Table 1 →

I have a drawing or modelModel + Pos. number → current partExplore ＋

Find the position number on your equipment drawing.
Match both the equipment model and Pos. number in Table 2.
Check the description, then request a quotation using the New P/N.

Go to Table 2 →

I need help identifying a partNameplate + serial number + photosExplore ＋

Send the equipment model, serial number, nameplate photo and a photo of the existing part. Include any old reference you have.

Request part identification →

Use your browser’s Find on the displayed table rows. Check other pages if needed. Multiple matches? Send your equipment serial number so we can confirm the correct part.

Table 1: old part number to new part number cross-reference

Match an old RWO or Deckma part number to its current reference, then check the description and equipment details before ordering.

Loading all parts for search and sorting…

Old PN

New PN

Description

CESWGU330027

Main switch P1-25 set

COM 0,1; COM 0,25; COM 0,5; COM 1,0; COM 2,5; COM 5,0; COM 10,0

CESWGU330026

Hand/stop/auto switch set

COM 0,1; COM 0,25; COM 0,5; COM 1,0; COM 2,5; COM 5,0; COM 10,0

CESWGU330025

Heating switch set

COM 0,1; COM 0,25; COM 0,5; COM 1,0; COM 2,5; COM 5,0; COM 10,0

8322025002

SESTSN316892

Cover and bottom gasket adsorber

109, 110

COM 10,0; COM 2,5; COM 5,0

8322010002

SESTSN316884

Cover and bottom gasket adsorber

109, 110

COM 1,0

8322001002

SEORFP317365

Cover gasket adsorber

109

COM 0,1

8322005002

SESTSN316883

Cover and bottom gasket adsorber

109; 109, 110

COM 0,25; COM 0,5

8321000002

SESTSN316908

Cover gasket

COM 10,0

8320500002

SESTSN316909

Cover gasket

COM 5,0

8320250002

SESTSN316910

Cover gasket

COM 2,5

8320100002

SESTSN316911

Cover gasket

COM 1,0

8320050002

SESTSN316912

Cover gasket

COM 0,5

8320025002

SEGASN316937

Cover gasket

COM 0,25

8320010002

SEGASN316936

Cover gasket

COM 0,1

8121008999

CMSPGU315961

Bolt M8

107

COM 0,1; COM 0,25; COM 0,5; COM 1,0; COM 10,0; COM 2,5; COM 5,0

Important notes below table:

Notes:

All part numbers are for genuine RWO and Deckma original components
If you find multiple matches, contact us with your equipment serial number
Some old part numbers may have multiple new equivalents depending on equipment version
Part numbers shown include direct replacements and functional equivalents
Superseded parts maintain the same form, fit, and function as original parts

Part number search by Pos. number & equipment model

Match both the equipment model and the position number from your drawing to find the current part number. Verify the description and equipment capacity before ordering.

Loading parts for search and sorting…

Pos. No.

Equipment Model

New P/N

Description

COM 0,1; COM 0,25

VANRBR340515

Non-return-flap, RG, DN 15

COM 1,0

VABLSS340688

3/2-way ball valve 1 "

COM 0,1; COM 0,25; COM 0,5

VABLSS340510

3/2-way ball valve 3/4"

COM 0,1; COM 0,25; COM 0,5; COM 1,0

VASMBR340467

Ball valve 1/2"

COM 10,0

VABLBR305702

2/2 way ball valve 1 1/2"

27; 27, 27A; 27A

COM 0,1; COM 0,25; COM 0,5; COM 1,0; COM 2,5; COM 5,0; COM 10,0

VABLBR339757

2/2 way ball valve 1"

27A

COM 0,25; COM 0,5; COM 1,0; COM 2,5

VABLBR305698

2/2 way ball valve 1/2"

27A, 59; 59

COM 0,1; COM 0,25; COM 0,5; COM 1,0; COM 2,5; COM 5,0; COM 10,0

VABLBR305696

2/2 vent valve 1/4"

COM 10,0

VABLCI340968

3-way ball valve DN 50 L

COM 2,5; COM 5,0

VABLCI340989

3/2-way ball valve DN 32

COM 2,5

VABLCI340988

3-way manual valve PN16 DN32 L

COM 10,0

VARFBZ340378

Safety valve 1,0 B, 1,0"

COM 10,0

VARFBZ340381

Safety valve 3.0 B, 1 1/4"

COM 5,0

VARFBZ340375

Safety valve, 3.0 B, 3/4"

COM 5,0

VARFBZ340374

Safety valve, 1.0 B, 3/4"

Important notes below table:

Notes:

Pos. numbers correspond to position numbers shown on equipment technical drawings
Same Pos. number may have different parts across different equipment sizes
Always verify equipment model and capacity when ordering
Some parts are universal across multiple models (indicated in description)
Contact us if Pos. number references differ from your equipment manual

Supported RWO & Deckma equipment models

Select an equipment family to see the models covered in this reference.

RWO separatorsOWS-COM and legacy Skit seriesExplore ＋

OWS-COM 0.5 m³/h
OWS-COM 1.0 m³/h
OWS-COM 2.5 m³/h
OWS-COM 5.0 m³/h
OWS-COM 10.0 m³/h
Legacy Skit series models

RWO AEP pumpsAEP 1 through AEP 6Explore ＋

AEP 1 series
AEP 2 series
AEP 3 series
AEP 4 series
AEP 5 series
AEP 6 series

Deckma OMDOil content monitors and bilge alarmsExplore ＋

OMD 2005
OMD 24
OMD 2008 series

Have a different model? Contact us →

Explore parts by system

Choose a system to explore its spare-part groups.

OWS-COMFilters · controls · mechanical partsExplore ＋

Filter & treatment

Coalescer filter material
Adsorber cartridge filters
Filter housing seals and gaskets
Complete filter service kits

Monitoring & control

Sensor electrodes
Heating elements
PC boards and display boards
Control relays

Mechanical components

AEP series pump parts (stators, rotors, shafts)
Solenoid valves
Pressure gauges

Browse RWO spare parts →

CS-BIOAeration · dosing · electrical partsExplore ＋

Aeration system

Blower units
Blower service kits
Air diffusers
Aeration tank components

Treatment & dosing

Chemical dosing pumps
Treatment chemicals
Dosing system components

Electrical & control

Control panels
Level sensors
Float switches

Browse RWO spare parts →

Deckma OMDMeasuring cells · test kits · desiccatorsExplore ＋

Measurement components

Measuring cells (15 ppm and 5 ppm versions)
Cell testing kits
Desiccator units

Browse Deckma spare parts →

Frequently asked

Frequently asked questions

Chief engineers and Ship managers ask us these every week. Still need an answer? Contact us directly.

Quote form (recommended)

npmarine.sg/contact →

sales@npmarine.sg

+65 97684033

Part number cross-reference guide

How to use this part number reference

Table 1: old part number to new part number cross-reference

Part number search by Pos. number & equipment model

Supported RWO & Deckma equipment models

Explore parts by system

Filter & treatment

Monitoring & control

Mechanical components

Aeration system

Treatment & dosing

Electrical & control

Measurement components

Frequently asked questions

Frequently asked questions
- part number cross-reference/

Need RWO or Deckma
‍spare parts?

Part number cross-reference guide

How to use this part number reference

Table 1: old part number to new part number cross-reference

Part number search by Pos. number & equipment model

Supported RWO & Deckma equipment models

Explore parts by system

Filter & treatment

Monitoring & control

Mechanical components

Aeration system

Treatment & dosing

Electrical & control

Measurement components

Frequently asked questions

Frequently asked questions - part number cross-reference/

1. Why do RWO and Deckma part numbers change?

Need RWO or Deckma ‍spare parts?

Frequently asked questions
- part number cross-reference/

Need RWO or Deckma
‍spare parts?