T-H Marine 18" Push-In Overflow Drain Tube – Straight, 1-1/2" Thru-Hull, with Screen

Simple Push-In Overflow Control for Livewells and Baitwells

The T-H Marine push-in overflow drain tube is the easiest way to manage your livewell or baitwell water level. Insert the flexible vinyl end into your thru-hull fitting to set your overflow height — pull it out to drain. No tools, no valves, no fuss.

This straight-style tube is 18" long with a white PVC standpipe and a built-in screen to keep debris out of your drain line. It fits all T-H Marine 1-1/2" thru-hull fittings and can be trimmed to your preferred length for a custom fit.

Key Features

• Push-in design — flexible vinyl end inserts directly into T-H Marine 1-1/2" thru-hull fittings; no tools required
• Simple drain operation — insert to hold water level, remove to drain by gravity
• 18" white PVC standpipe — sets overflow height inside the livewell or baitwell
• Built-in screen — keeps debris from entering the drain line
• Trimmable to length — cut the PVC tube to match your livewell depth or preferred overflow height
• Straight configuration for standard vertical installations
• Fits all T-H Marine 1-1/2" thru-hull fittings

Installation Notes

• Requires a T-H Marine 1-1/2" thru-hull fitting (sold separately) — see the T-H Marine 90° Thru-Hull Fitting for a compatible angled option
• Insert the flexible vinyl end into the thru-hull opening to seal; pull out to drain
• Trim the PVC standpipe to your desired overflow height using a standard pipe cutter or saw

Best For

Anglers building or replacing a livewell or baitwell overflow system who want a simple, tool-free drain solution. The push-in design is ideal for situations where quick draining is needed without a valve — just pull the tube. The 18" length and trimmable standpipe make it adaptable to a wide range of livewell depths and tank configurations.

Parts Desk Insights

This is the most common overflow drain tube recommendation for customers running T-H Marine thru-hull fittings in a standard straight installation. Confirm the customer has a T-H Marine 1-1/2" thru-hull before selling — this tube is sized specifically for that fitting family. The trimmable length is a strong selling point for customers who aren’t sure of their exact livewell depth. If the customer needs a 90° angled exit at the hull, pair this tube with the T-H Marine 90° Thru-Hull Fitting. The built-in screen is worth mentioning to customers who have had debris issues in their drain lines.