Overview

The Attwood Marine AK5512-7 is a service kit for S1200 bilge pumps and is compatible with Tsunami Bilge Mk2. It includes outlet components for 1 inch (25 mm) and 1-1/8 inch (28 mm) hose connections, along with the washer and non-return/check valve used on the discharge side of the pump.

This is a parts kit, not a full replacement pump. It suits owners who are servicing an existing S1200 installation and need to replace the outlet pieces and check valve without changing the whole pump assembly.

The straight outlet and 90 degree outlet give you two routing options when space around the pump is limited. That matters in a bilge where hose direction, nearby structure, and clearance above the pump can affect how cleanly the discharge line is laid out.

Key features

• Compatible with S1200 bilge pumps in the Tsunami Bilge Mk2 range
• Includes both straight and 90 degree outlet fittings for different hose-routing layouts
• Supports 1 inch (25 mm) and 1-1/8 inch (28 mm) outlet connections
• Includes a replacement washer and non-return/check valve for outlet-side service work
• Service kit format focused on the discharge connection parts rather than a complete pump replacement

Compatibility and fit

Fit should be checked against the pump model and the discharge hose size already on board. This kit is intended for S1200 service work, and the included outlet sizes cover 1 inch and 1-1/8 inch hose connections.

It is a good match for boats already running an S1200 pump where the pump body remains in service but the outlet hardware needs attention. That can be useful during routine bilge maintenance or when the discharge side has been disturbed during refit work.

Installation and setup

During service, the outlet style can be matched to the hose run that makes the most sense for the space available. A straight outlet works where the hose can rise cleanly from the pump, while the 90 degree outlet helps when the discharge line needs to turn quickly in a low bilge compartment.

Replacing the washer and non-return/check valve at the same time helps bring the outlet stack back together with the correct service parts. For owners working in cramped bilge spaces, having the main outlet pieces in one kit keeps the job simpler.

What’s included

• 90 degree outlet
• Straight outlet
• Washer
• Non-return/check valve