UPVC Water Tank Drain Valve Kit G12 to G2 Bulkhead Assembly with Ball Valve & Hose Barb Clamp Set - Atradesen

Premium UPVC Water Tank Drain Valve Assembly Kits

Establish a secure, high-flow discharge system on your water towers, buckets, ponds, and fish tanks with our premium UPVC water tank drain valve assembly kits, available at Atradesen.com. Crafted from potable water-grade and chemical-grade UPVC, this complete mechanical kit is engineered to withstand up to 16kg (1.6 MPa) of pipeline pressure. It provides a leak-free, ready-to-assemble drainage switch that hooks directly into flexible soft hoses.

Featuring standard parallel pipe threads, this linear assembly ensures massive flow volume and extremely low pressure loss, making it the exceptional choice for bulk water discharge and routing.

Complete 5-Piece Professional Plumbing Package

Each package comes fully equipped with all necessary professional installation components, eliminating the need to source separate fittings:

• 1 x Composite Bulkhead Tank Connector: Features twin rubber washers for dual-sided clamping on both smooth inner and outer tank walls. Equipped with an internal socket port.
• 1 x Male-to-Female Threaded Ball Valve: Smooth-bore, high-capacity flow control with a slip-resistant blue butterfly lever.
• 1 x Male Threaded Hose Barb (Pagoda) Connector: Provides a tapered, slip-on transition directly to your flexible soft hoses.
• 1 x Roll of High-Density PTFE Thread Seal Tape: For wrapping male threads to secure watertight, leak-proof mechanical joints.
• 1 x 304 Stainless Steel Hose Clamp: Equipped with an easy-turn yellow thumb-key for secure, tool-free hose locking.

Single-Side Port Design & Left-Hand Locking Nut

• Internal Socket Port: The compound bulkhead connector is engineered with an internal smooth socket on its inner side. This allows you to solvent-weld an additional rigid PVC pipe inside the tank to act as an inlet feeder or vertical overflow tube without modifying the tank wall.
• Left-Hand Thread Warning: The large outer locknut of the bulkhead tank connector features a left-hand thread (reverse thread / counter-clockwise to tighten). Turn the nut counter-clockwise to secure it against the tank wall, and clockwise to loosen it. For larger sizes, utilizing a hex wrench or pipe wrench is highly recommended to achieve tight gasket compression.

Technical Specifications

Frequently Asked Questions (FAQ)

Q: Why does the bulkhead locknut tighten counter-clockwise (reverse thread)?

A: When you screw a standard right-hand threaded ball valve onto the bulkhead's external threads, the clockwise turning force would normally loosen a standard bulkhead nut. The left-hand (reverse) thread design ensures that tightening the ball valve actually locks the bulkhead nut even tighter against the tank wall, preventing accidental loosening and leakage.

Q: What can I connect to the inner socket port of the bulkhead connector?

A: The inner port features a standard smooth socket designed for solvent welding. You can glue in a rigid PVC pipe to act as a standpipe, a vertical overflow bypass, or an intake screen, allowing you to control the water level from inside the tank.