Attwood Tsunami MK2 1200 GPH Manual Bilge Pump - Air-Lock Free

In this review the Attwood Tsunami MK2 1200 GPH 12-Volt manual bilge pump is evaluated for boat owners who need a simple, reliable means to remove water without automatic complexity. The bottom line: this pump is for anglers, small-boat owners and anyone fitting or replacing a manual bilge unit who values a design that eliminates air-locks. Its patented X-Air impeller and rotatable outlet make it the most dependable non-automatic option in freshwater applications and the easiest manual unit to install and service.

Key Features

• Patented X-Air Impeller: Forces trapped air out of the hose and pump so the unit keeps moving water without running dry or burning out.
• 1200 GPH Capacity: Provides robust manual discharge for most small boats and fish wells while remaining hand-operable.
• Flexible 360 Outlet: A 90 rotatable elbow with two barb sizes lets installers orient the outlet in any position for tight installations.
• Single-Hand Cartridge Release: Makes servicing or removing the pump cartridge possible in cramped hull locations without major disassembly.
• Retrofit Footprint: Matches the footprint of the prior model so existing mounting holes and locations generally remain usable for upgrades.
• Short Wire with Fuse Specified: Comes with 29 in of wire and specifies a 6A fuse to simplify wiring and protection decisions.

Who It's For

The Tsunami MK2 is best for recreational boaters, anglers and small commercial operators who need a manual bilge pump that will not suffer from air-locks and who prefer a straightforward, serviceable design. Its ease of installation and universal footprint suit owners replacing older manual pumps or fitting a compact pump in a fish well or stern locker.

This is not intended for owners who require an automatic or high-capacity electric system for large powerboats or continuous dewatering; those users should look at powered automatic bilge systems. It is optimized for freshwater use where the X-Air impeller gives the clearest advantage.

Pros & Cons

Pros

• Reliable operation in freshwater because the X-Air impeller ejects trapped air and prevents air-locks.
• Easy to install and service with a single-hand cartridge release and a retrofit footprint that fits many existing mounts.
• Flexible outlet options and two barb sizes make routing discharge hose straightforward in tight spaces.
• Wiring is simple with a 29 in lead and a clear 6A fuse specification for protection.

Cons

• Designed as a non-automatic manual pump, it is not suitable where automatic bilge activation is required.
• Optimized for freshwater; saltwater users may want to verify long-term corrosion resistance for their application.

Specifications

Part Number	PN 5612-7
Flow Rate	1200 GPH
Voltage	12V
Fuse Size	6A
Outlet Types	1 in and 1-1/8 in barbs
Check Valve	Yes
Wire Length	29 in

Our Verdict

The Attwood Tsunami MK2 1200 GPH is a worthwhile buy for anyone needing a dependable manual bilge pump that solves air-locks and is easy to install and service. For freshwater use on small boats and fish wells it offers strong value through durable engineering, simple wiring guidance and a retrofit-ready design.

Frequently Asked Questions

Does this pump prevent air-locks?
The patented X-Air impeller is specifically designed to eject trapped air from hose and pump so the unit avoids air-locks in normal freshwater use.

What fuse and wiring come with the pump?
The pump specifies a 6A fuse and includes 29 in of wire to simplify connection and circuit protection.

Can it replace existing manual pumps?
Yes, it retrofits the footprint of the prior model and often fits existing mounting locations for straightforward replacement.