Jabsco Vented Loop, For Marine Toilets, Plastic, Anti-Siphon

Overview

The Jabsco Vented Loops is a range of anti-siphon plumbing fittings for Jabsco marine toilet installations where the toilet or pipework sits below the vessel's static or heeled waterline. The range covers 19 mm (3/4"), 25 mm (1"), and 38 mm (1-1/2") hose sizes, so the fitting can be matched to flush inlet or waste discharge plumbing rather than adapted with reducers.

Each vented loop uses a valve at the top of the loop to admit air and break siphon action after pumping. This helps stop water from continuing to travel through the pipework by gravity, which is a key safety concern on boats with through-hull toilet plumbing.

For correct siphon protection, the loop should be mounted at least 200 mm (8") above both the static and heeled waterlines. Placement matters: in inlet plumbing it belongs on the discharge side of the pump, not in the suction line between the seacock and pump.

Key features

• Anti-siphon fitting for manual and electric Jabsco marine toilets installed below the waterline.
• Valve at the top of the loop lets air enter the pipework to break siphon action after the toilet is pumped.
• Available for 19 mm (3/4"), 25 mm (1"), and 38 mm (1-1/2") hose connections.
• Molded plastic construction suits marine toilet plumbing where exposure to moisture and confined installation spaces are common.
• Supports safer routing for inlet and discharge hose loops when installed above the static and heeled waterlines.
• Useful for refits, toilet replacements, and service work where existing below-waterline pipework needs proper siphon protection.

Variants

This product is offered in three hose-size configurations for matching the vented loop to the existing toilet plumbing.

The hose size is the key difference between variants. The anti-siphon function and vented-loop purpose remain the same across the range.

• 29015-0000: 19 mm (3/4") hose size. This size is commonly used in flush water inlet loop plumbing on Jabsco toilet installations.
• 29015-0020: 25 mm (1") hose size. This size suits installations using 25 mm hose, including macerated waste discharge loop layouts where that hose size is specified.
• 29015-0010: 38 mm (1-1/2") hose size. This size is used for larger waste discharge hose runs, including toilet or holding tank discharge pipework.

Installation and fit

Install the vented loop at the highest practical point in the run, with the top of the loop at least 200 mm (8") above the waterline in both normal and heeled conditions. On sailing boats and narrow-beam vessels, the heeled waterline can be much higher than the static waterline, so the mounting height should be checked before the hose is cut.

For inlet installations, the fitting should not be placed in the suction line between the inlet seacock and the pump because the vent can admit air and stop the pump from priming. It belongs after the pump, between the pump and the toilet bowl, where siphon breaking is needed without interrupting suction.

Use on board

These vented loops are a practical match for boat owners, yards, and service technicians working on Jabsco heads where below-waterline plumbing needs a proper siphon break. They are especially relevant during toilet upgrades, hose replacement, seacock service, or any refit where the original hose routing is being checked for flooding protection.

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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.

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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.

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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.

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