Johnson Ultima Combo Automatic Submersible Bilge Pump -

The Johnson Pump Ultima Combo brings together two proven technologies in one reliable, automatic bilge pump.

The cartridge bilge pump — a trusted Johnson Pump design — is paired with the electronic Ultima Switch for fully automatic, fit-and-forget bilge protection. Unlike traditional float switches, the Ultima Switch uses patented Mirus field effect detector cells to sense water presence through micro-electrical fields. The detector cells are completely sealed, never contact the water directly and are unaffected by oil or debris.  This helps in eliminating the corrosion and false triggering that plague conventional float switches.

Available in five capacities across both 12V and 24V to suit a wide range of vessels.

Key Features

• Ultima Switch automatic operation - Patented Mirus field effect technology detects water presence without physical contact. Sealed detector cells won't corrode or be affected by oil or bilge debris.
• Cartridge pump design - Compact, all-in-one motor and impeller unit with stainless steel shaft (SS2343) for long-term reliability and easy servicing.
• Tool-free maintenance - No need for complete disassembly. The pump casing can remain attached to the boat and hoses during servicing, saving significant time and hassle.
• Dura-Port discharge ports - 500, 800 and 1000 GPH models include both straight and 90° smooth elbow Dura-Port fittings to eliminate stress cracking from over-tightened hose clamps. (12V models only — 24V models do not include Dura-Port connection.)
• Removable check valve - Included as standard on 500, 800 and 1000 GPH models.
• Water-cooled motor - Keeps running temperatures low for extended service intervals and long pump life.
• Extremely energy efficient - High flow rates with low amperage draw across all models.
• ISO 8849 certified - Meets the international standard for marine bilge pumps.
• Available in 12V and 24V - 12V models available in 500, 800, 1000 and 1250 GPH. 24V models available in 1000 and 1250 GPH.

Technical Specifications

500 GPH 12V — Force 4 P/N: 830890-9200

• Flow Rate - 500 GPH / 33 litres per minute
• Voltage - 12V DC
• Amperage - 2.5A
• Fuse Size - 5A
• Discharge Connection - ¾"
• Dimensions - H112 x D108 x W85mm
• Weight - 0.40kg
• Manufacturer P/N - 32-1450UC-01
• Includes - Dura-Port (straight & 90°), removable check valve

800 GPH 12V — Force 4 P/N: 830890-9202

• Flow Rate - 800 GPH / 44 litres per minute
• Voltage - 12V DC
• Amperage - 3.0A
• Fuse Size - 5A
• Discharge Connection - ¾"
• Dimensions - H112 x D108 x W85mm
• Weight - 0.40kg
• Manufacturer P/N - 32-1550UC-01
• Includes - Dura-Port (straight & 90°), removable check valve

1000 GPH 12V — Force 4 P/N: 830890-9204

• Flow Rate - 1000 GPH / 50 litres per minute
• Voltage - 12V DC
• Amperage - 3.2A
• Fuse Size - 5A
• Discharge Connection - ¾"
• Dimensions - H112 x D108 x W85mm
• Weight - 0.40kg
• Manufacturer P/N - 32-1650UC-01
• Includes - Dura-Port (straight & 90°), removable check valve

1250 GPH 12V — Force 4 P/N: 830890-9205

• Flow Rate - 1250 GPH / 60 litres per minute
• Voltage - 12V DC
• Amperage - 3.0A
• Fuse Size - 5A
• Discharge Connection - 1⅛"
• Dimensions - H112 x D108 x W85mm
• Weight - 0.45kg
• Manufacturer P/N - 32-1750UC-01
• Includes - Dura-Port (straight & 90°), removable check valve

1000 GPH 24V — Force 4 P/N: 830890-9209

• Flow Rate - 1000 GPH / 50 litres per minute
• Voltage - 24V DC
• Amperage - 3.2A
• Fuse Size - 5A
• Discharge Connection - ¾"
• Dimensions - H112 x D108 x W85mm
• Weight - 0.40kg
• Manufacturer P/N - 32-1650UC-01-24
• Note - Does not include Dura-Port connection

1250 GPH 24V — Force 4 P/N: 830890-9210

• Flow Rate - 1250 GPH / 60 litres per minute
• Voltage - 24V DC
• Amperage - 3.0A
• Fuse Size - 5A
• Discharge Connection - 1⅛"
• Dimensions - H112 x D108 x W85mm
• Weight - 0.45kg
• Manufacturer P/N - 32-1750UC-01-24
• Note - Does not include Dura-Port connection

Download Johnson Ultima Combo Bilge Pump Instruction Manual here.

Our Mail Order team ship chandlery, yacht parts and sailing clothing around the world. We use the best value couriers available, and we will endeavour to get your products to you as quickly and as cost effectively as possible.

International Orders: Due to delays we have had to suspend our international delivery options. 

UK Standard Delivery

• UK Mainland 0 - 2Kg (small jiffy) £3.95 Royal Mail Service. Despatch within 3- 5 working days, delivery in 7-10 working days for orders under £100.00. This is an estimated delivery window from our chosen courier.
• UK Mainland 0 - 30KG £5.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days. This is an estimated delivery window from our chosen courier.
• UK Mainland 0 - 30KG OVER 1.2m LENGTH £15.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days. This is an estimated delivery window from our chosen courier.
• UK Mainland 30KG+ Price on request
• UK Mainland Next Day 0 - 30KG £9.95 Courier service with signature, orders must be placed before midday. This is an estimated delivery window from our chosen courier.
• UK Mainland Next Day 0 - 30KG OVER 1.2m length £19.95 Courier service with signature, orders must be placed before midday. This is an estimated delivery window from our chosen courier.
• UK Mainland Saturday 0 - 30KG £19.95 Courier service with signature, orders must be placed before Friday. This is an estimated delivery window from our chosen courier.
• Northern Ireland, Highlands & Islands 0 - 2KG (small jiffy) £3.95 Royal Mail Service. Despatch within 3- 5 working days, delivery in 7-10 working days for orders under £100.00. This is an estimated delivery window from our chosen courier.
• Northern Ireland, Highlands & Islands 1 - 30KG £10.95-£14.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days
• Northern Ireland, Highlands & Islands 1 - 30KG OVER 1.2m length  from £24.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days
• Northern Ireland, Highlands & Islands 30KG+ Price on request
• Channel Islands 0 - 2KG (small jiffy) £5.95 Royal Mail Service Despatch within 3- 5 working days, delivery in 7-10 working days for orders under £50.00
• Channel Islands 1 - 30KG £19.95 Courier service with signature. Despatch within 3- 5 working days, delivery in 7-10 working days
• Channel Islands 30KG+ Price on request

UK Exceptional Delivery

• UK Mainland; Antifoul & paints £5.95
• UK Mainland; Inflatable dinghy £10.00
• UK Mainland; Liferafts £29.95
• UK Mainland; Flares £49.95
• Northern Ireland, Highlands & Islands; Antifoul & paints £9.95
• Northern Ireland, Highlands & Islands; Inflatable dinghy price on request
• Northern Ireland, Highlands & Islands; Liferafts price on request
• Northern Ireland, Highlands & Islands; Flares not available to ship at this time
• Channel Islands; Antifoul & paints £16.95
• Channel Islands; Inflatable dinghy price on request Channel Islands; Flares not available to ship at this time

Ship to Store service; You can now order from our website for collection from one of our 8 Force 4 locations. Simply select “Ship to Store” at checkout and your goods will be ready for collection within 5 working days. This service is free however may exclude some hazardous or special order goods.

For further delivery information click here.

Standard Returns

If you are not entirely happy with your purchase, we will exchange or refund your goods in full, provided that the items are returned within 14 days of receipt.*

Please check the condition of goods on arrival - we are unable to accept goods damaged during shipping after 14 days.

Returned goods must be packaged securely, with all original packaging undamaged and in a saleable condition i.e. shoe boxes must be in the same condition as when received.

Goods must be unused and security seals intact.*

If you would like to return goods because they were ordered incorrectly or if clothing does not fit, return postage will be at your expense. If you would like us to replace the goods with another size or colour, we will charge carriage on the replacement.

Please be aware that some navigational and safety products may be dated, and as such a full refund may in some cases not be possible. If you are purchasing dated navigational charts we suggest you contact us for more information.

Faulty Goods

If you receive your goods and believe them to be faulty, please contact us straight away with a brief description of the problem. If we require you to return the product for a replacement, we will send you a pre-paid Royal Mail label for delivery back to us. Unfortuantely we cannot send the courier back to collect the items.

Returning goods to Force 4 is easy!

1. Please contact us by ringing 0345 1300 710 or email on [email protected]. This way we'll be able to determine whether you would like to return the product for a refund or whether you'd like to exchange the product. We are unable to process the return of faulty goods that we're not expecting.
2. We'll then give you a returns number. This returns number will need to be clearly marked on the outside of your parcel so it can be identified on arrival. Please note, failure to mark a returns reference number on the outside of your parcel may result in a delay in processing your return.
3. Don't forget your proof of postage, just in case!
4. Once we receive the item we'll be able to proceed with a refund or an exchange.

*this excludes faulty goods with manufacturers defects. If goods are found to be faulty during use, after the returns period, please just give us a ring on 0345 1300 710 and we'll be happy to help.