Attwood Marine Tsunami MK2 T500 Manual Bilge Pump Kit, 500 GPH, 12V, 3/4 in Hose Outlet

Overview

The Attwood Marine 5614-7 is a 12V non-automatic bilge pump kit built around the Tsunami Mk2 T500 pump. It is rated for 500 GPH and comes packaged as a complete 3/4 in I.D. hose installation set, so you are not piecing together the hose, thru-hull fitting, switch, wiring, and small hardware separately.

This is the right kind of setup when you want a manually switched electric bilge pump rather than an automatic pump with a built-in float or sensor. The Tsunami Mk2 pump uses an X-Air impeller that clears trapped air from the pump and discharge line, which helps in installations where hose routing or mounting position can leave air pockets behind.

The pump itself is IP68 rated, uses a 29 in lead, and can pump down to a 10 mm water level. The T500 pump accepts 3/4 in and 1 in barbed outlet connections, while this kit is packaged around a 3/4 in discharge run.

Key features

• 12V Tsunami Mk2 T500 bilge pump rated at 500 GPH for a manually switched bilge circuit.
• X-Air impeller helps clear trapped air from the pump and pipework, which reduces the chance of an airlock stopping flow.
• Installation kit is arranged for a 3/4 in I.D. hose run and includes the discharge hose, matching thru-hull fitting, clamps, switch, wire, and fuse holder.
• IP68 pump construction with an SS316 motor shaft and nitrile seals for bilge spaces that stay wet.
• 29 in pump lead, plus 20 ft of 16-gauge wire in the kit, gives more room when the switch panel sits away from the bilge.
• Minimum water level of 10 mm helps the pump pull the bilge down lower before water is left behind.

Installation and setup

This kit is intended for a 12V DC system and a manually controlled pump circuit. The included 2-way on/off switch gives you a straightforward helm or panel control, but the switch is not external ignition protected, so it should not be installed where that protection is required.

The discharge side is built around 3/4 in hose, with a 5 ft corrugated hose and matching thru-hull fitting included in the box. On boats where the bilge space is tight, the Mk2 layout is easier to work with than older pump designs because service access to the cartridge is simpler and the mounting arrangement is friendlier for retrofit work.

Compatibility and fit

This pump suits boats that use a 12V electrical system and need a compact, manually switched bilge pump in the 500 GPH range. It works well for smaller bilge compartments, secondary pump positions, and general bilge duty where a simple switch-operated setup is preferred over a more complex automatic system.

If you are replacing an older pump, the Mk2 range keeps retrofit-friendly mounting options for some earlier Tsunami Mk1 and Johnson L Series layouts. That can reduce drilling and rework when you are updating an existing installation.

What’s included

• Tsunami Mk2 T500 bilge pump
• 2-way on/off switch with bezel plate
• 3/4 in I.D. x 5 ft corrugated hose
• Thru-hull fitting for 3/4 in I.D. hose
• Two Snap-It hose clamps
• 2-conductor 16-gauge wire, 20 ft long
• In-line fuse holder

Orders are processed within 2 business days, which includes verification, packing, and dispatch. Orders of $100 or more qualify for free shipping when eligible. For orders under $100, shipping costs are calculated at checkout based on destination, package weight, and selected service. International shipping is available for eligible products, and certain items may require additional handling, warehouse transfers, or may ship directly from the manufacturer, which can affect processing time.

Deliveries are handled by preferred carriers such as USPS, UPS, FedEx, DHL, and others depending on your location and selected service. Estimated delivery times are displayed at checkout and may vary due to customs processing, carrier delays, weather, postal disruptions, or other circumstances beyond our control. Once your order ships, you'll receive a confirmation email with tracking information. Tracking may take up to 24 hours to update on the carrier's website and is also available through your account when applicable.

We ship throughout the United States and to most international destinations for products eligible for international shipping. International orders may be subject to customs duties, taxes, brokerage charges, or other import fees, which are the customer's responsibility and are not included in the product or shipping price. PO Boxes are accepted only when shipping through USPS, and not all packages qualify for this option. If your order does not arrive within the estimated delivery window, please contact us at info@apollolighting.com or +1 (954) 375-0100 so we can assist with locating your package.

Learn more.

Returns may be requested within 30 days of receiving your order. Items must be unused, uninstalled, unaltered, and returned in their original packaging with all tags, packing materials, blank warranty cards, manuals, instructions, accessories, and included items. Certain products, including installed or used electronics, electrical components, lighting, consumables, custom or special-order items, cut-to-length products, safety equipment, and merchandise exposed to water or marine conditions, may not be eligible for return.

To request a return, sign in to your account and select the applicable order and items, and submit your request for review. Eligible unfulfilled items may also be submitted for cancellation within 1 hour of placing the order. Returns or cancellations are not considered approved until you receive confirmation from Apollo Lighting. Please do not ship or drop off merchandise before receiving return approval and instructions.

Customers are responsible for arranging and paying for return shipping unless the return is due to an error by Apollo Lighting or the item is verified as defective, damaged, or incorrect. Missing, damaged, defective, or incorrect items must be reported within 2 business days of delivery, and photos or other documentation may be required for review. If the issue is verified, Apollo Lighting may provide or reimburse return shipping and issue a replacement or refund depending on the circumstances. International customers are responsible for return shipping, duties, taxes, customs charges, brokerage fees, and other costs associated with an international return.

After your return is received and inspected, approved refunds are issued to the original payment method and may take 5-7 business days to appear after processing. Original shipping and handling charges are nonrefundable, and the value of any included free items that are not returned may be deducted from the refund. Apollo Lighting does not charge a standard restocking fee on eligible returns. Returns that are incomplete, damaged, installed, used, altered, improperly packaged, or otherwise do not meet the eligibility requirements may be refused. We recommend using a trackable and appropriately insured shipping service for all customer-arranged returns.

For assistance, contact info@apollolighting.com or call +1 (954) 375-0100.

Learn more.

Many products sold by Apollo Lighting include a manufacturer's warranty covering defects in materials or workmanship. Warranty terms vary by brand, product category, and model, so eligibility, coverage duration, exclusions, and available remedies are determined by the applicable manufacturer. We recommend reviewing the warranty information provided with your product before installation or use, especially for marine electronics, navigation equipment, lighting, electrical systems, pumps, safety equipment, and other specialized marine products.

If you need warranty service, the claim must follow the process established by the manufacturer, authorized service center, or designated warranty provider. You may be asked for proof of purchase, a serial number, product registration, photos, maintenance or installation records, or other documentation. Apollo Lighting does not determine or modify a manufacturer's warranty coverage or final claim decision, but we are happy to help provide purchase information and direct you to the appropriate manufacturer or warranty resource.

Keep your receipt, product documentation, serial number information, and original packaging when practical. Damage caused by normal wear, misuse, improper installation, insufficient maintenance, corrosion, impact, unauthorized modifications, electrical issues, or operation outside the manufacturer's specifications may not be covered. Warranty claims are separate from standard returns, so a product that has been installed, used, or exposed to marine conditions may no longer qualify for return while still remaining eligible for evaluation under the manufacturer's applicable warranty.

Learn more.