Where does the check valve go?

I don’t have a check valve in mine

What size is outlet ?

I don’t know it’s on the description

will this pump only turn on when water is high enough ?

You must buy the float switch if you want that function

Can I use this for a ballast bag on my boat?

Yes. I would think so. Not sure about the duty cycle but it is fast when you run it.

32903 Cartridge Bilge Pump with Dura-Port - 1000 GPH

Product ID: 317164856

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Details

Brand
Johnson Pump
Colour
Black
Material
Plastic
Product dimensions
20.3L x 15.2W
Style
Bilge Pump

⚡12V power source

💧1000 GPH flow rate

🔧Universal fit & easy install

Description

🚤 Stay afloat with power and precision—your bilge’s best friend!

COMPACT YET MIGHTY - Lightweight 408g build with a sleek 20.3 x 15.2 x 10.2 cm footprint fits anywhere.
SMART COMPATIBILITY - Easily hooks to auto switches for hands-free operation and peace of mind.
DURABLE DEPENDABLE - Crafted with high-quality plastic and backed by a 4.6-star rating from 195 users.
PLUG PLAY SIMPLICITY - Universal fit design ensures seamless installation—no hassle, no downtime.
POWER PACKED PERFORMANCE - Delivers a robust 1000 gallons per hour to keep your bilge dry and your boat safe.

The Johnson Pumps 32903 Cartridge Bilge Pump offers a powerful 1000 GPH flow rate powered by a reliable 12V AC/DC source. Its universal fit and compact design make installation effortless, while durable materials ensure long-lasting performance. Trusted by professionals and rated 4.6 stars, it’s engineered to keep your boat dry and secure.

Specifications

ASIN	B000N9REY8
Brand Name	Johnson Pump
Color	Black
Customer Reviews	4.6 4.6 out of 5 stars (195)
Flow Rate	1000 Gallons Per Minute
Global Trade Identification Number	00729321329033
Included Components	CARTRIDGE BILGE PUMP 1000 GPH
Item Dimensions L x W x H	20.3L x 15.2W x 10.2H centimeters
Item Type Name	CARTRIDGE BILGE PUMP 1000 GPH
Item Weight	408 g
Manufacturer	Acr Electronics
Material Type	Plastic
Maximum Lifting Height	3 Feet
Model Number	32903
Power Source	Ac/dc
Product Style	Bilge Pump
UPC	729321329033
Unit Count	1.0 Count
Voltage	12 Volts

Reviews

M**S

Can be glued to Boat of floor and hooked to Auto switch.

11.09.2025

G**H

This item works as it should. No frills and easy to hook up.

27.05.2025

E**D

Well done

12.07.2024

J**S

I am happy with the purchase and it works like it's supposed to.

19.04.2024

J**L

Works great

27.08.2023

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TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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3 weeks ago

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TrustScore 4.5 | 7,300+ reviews

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