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Description
The Whale Deckplate/Pump Gaiter Kit AS3725 provides a reliable seal for Whale lidded deckplates and compatible bilge pumps. Designed to replace worn rubber boots, it helps maintain a watertight installation for Gusher and Whale pump systems. The kit includes a durable gaiter and retainer O-ring for secure, dependable performance.
Whale Deckplate/Pump Gaiter Kit - AS3725 Item # 887841
Description
Features:
- Gaiter Kit for Whale Deckplates including the Gusher 10 Mk 3, Gusher Titan, Gusher 30, Gusher Urchin, Mk 5 and Gusher 8 MK3 Pumps
- The AS3725 Whale Deckplate / Pump Gaiter Kit replaces the rubber boot used to seal all Whale lidded deckplates and includes the retainer O-ring for the Whale aluminum lidded deckplate
Fits the following Whale Pumps:
- BP3708 Standard Pump
- BP3740 Thru-Deck / Bulkhead Diecast Alloy Bilge Pump
- BP3000 On-Deck Pump
- BP3010 On-Bulkhead Pump
- BP3020 Thru-Deck Pump, Whale's Largest Capacity Bilge Pump
- BP4410 Under Deck Pump, a Powerful Lightweight Bilge and Waste Pump
- Mounted through-deck with the DP9906 kit
- BP9013 Under Deck Pump, a Compact Bilge and Waste Water Transfer Pump
- BP0510 / MH0510 Bilge and Waste Water Transfer Pumps
- Gusher 8 MK3
In the Box:
- (1) Gaiter for Metal or Plastic Deckplates
- (1) O-ring for Metal Deckplate
Note: Cast body and mounting bracket are not available as service parts.
Part Numbers for Whale Deckplate/Pump Gaiter Kit - AS3725
Reviews
Rated 5 out of
5
by
Pau Hana from
Don't skip the deck plate
Exactly what we needed to rebuild the manual bilge pump in our 2000 leopard 38. The actual work was fairly straightforward, once we figured out what we needed.
We were tempted to skip replacing the deck plate/gaitor because the old one seemed fine at first glance. But a closer look showed that the rubber had gotten stiff and was destined to crack at the worst possible time. So I'm glad we took care of it!
Defender always ships fast and this time was no exception.
Date published: 2026-04-20
Rated 5 out of
5
by
sherwin from
Pump part received in good fashion
Received this correct part to rebuild my Whale Gusher 10 sump pump. It was less costly that other vendors. It arrived in a reasonable time. I have used Defender for many years, especially when I need a special hard to find part at a reasonable cost.
Date published: 2025-07-29
Rated 2 out of
5
by
Bob F from
Whaler
pump kit
I rebuilt my whale pump about 12 years ago. The sun baked the o ring for the closure. Had to order whole kit just to get the oring. New oring is slightly over sized making it hard to install and close cover
Date published: 2023-07-31
Rated 5 out of
5
by
James T from
Whale pump parts
Good delivery on time. Will purchase from them again.
Date published: 2023-04-11
Questions
This is different from the one I removed. I believe I have the Whale Gusher Mk 3, I previously ordered and installed the pump rebuild kit which fit fine. The gaiter I took off is taller and the hole is offset and angled. Is this indeed the correct one?
I think it’s likely the correct replacement. The old one is probably stretched and the angle of the hole from it forming to the pump lever receiver while at rest. My MK 3 kit looked just like your photo and fit perfectly.
Date published: 2026-04-01