2in Thread x Thread PVC Bulkhead
SKU: RF-92020-TT
- Dual Threaded Ports: Features 2" female threaded (FNPT) connections on both ends for a highly serviceable, glue-free installation.
- Premium Ribbed Sealing Gasket: Includes a thick, custom-molded black EPDM rubber gasket designed to seat perfectly against glass or acrylic surfaces without slipping.
- Aquarium-Grade Black uPVC: Solid black coloration resists UV degradation and blends seamlessly against painted or vinyl-backed aquarium backgrounds.
- Reef Safe Construction: Free from heavy metals, plasticizers, and recycled materials, ensuring 100% compatibility with delicate corals and marine fish.
- Left-Hand Reverse Threading: The external locking nut features reverse threading to prevent the bulkhead from spinning or loosening during piping installation.
CoralVue 2in Thread x Thread PVC Bulkhead Fitting (SKU: RF-92020-TT)
The CoralVue 2" Thread x Thread PVC Bulkhead (SKU: RF-92020-TT) is a commercial-grade, heavy-duty structural fitting designed to provide absolute leak protection at the critical junction where water exits or enters your display tank. Large display aquariums and high-volume filtration sumps require substantial drainage capacity, and a true 2-inch plumbing line is the standard for high-turnover primary gravity drains and master closed-loop suction ports. Unlike light-duty pond fittings, this bulkhead is molded from high-impact, thick-walled unplasticized PVC (uPVC) built to withstand the physical stress of heavy pipe runs and continuous system vibration.
This bulkhead uses a specialized Thread x Thread configuration. Both the flange head (the wet side of the bulkhead) and the body socket (the dry side) feature a 2" female NPT thread. This allows you to screw in pre-fabricated overflow screens, elbow standpipes, or emergency drain covers on the wet side, while utilizing threaded male adapters or true union ball valves on the dry side. Because no solvent welding (gluing) is required, this bulkhead can be completely disassembled and reconfigured, making it the ideal choice for aquarists who value long-term flexibility and easy maintenance.
Key Features
Thick-Flange Design: Features a wide, structural flange head that distributes clamping force evenly across glass or acrylic panels to prevent stress fractures.
Reversible Locking Nut: Includes a heavy-duty hexagonal nut with integrated flats, allowing for easy hand-tightening or precision wrench adjustment.
Fully Serviceable Layout: Allows for quick removal and replacement of surrounding plumbing assemblies without cutting or replacing the bulkhead itself.
(Note: This retail SKU contains (1) complete RF-92020-TT bulkhead assembly, including the uPVC bulkhead body, (1) rubber sealing gasket, and (1) reverse-threaded locking nut).
What’s Included:
(1) CoralVue RF-92020-TT 2" Thread x Thread Bulkhead Body
(1) Custom-molded rubber compression gasket
(1) Heavy-duty reverse-threaded uPVC locking nut
Technical Specs:
Official Manufacturing Title: 2" FPT Flange x 2" FPT Body Heavy-Duty Bulkhead
SKU / Factory Part Identifier: RF-92020-TT
Internal Flange Connection (Wet Side): 2" Female NPT (Threaded)
Internal Body Connection (Dry Side): 2" Female NPT (Threaded)
Required Glass Cutout Diameter: 74mm (approx. 3" / 2.91" exact decimal)
Maximum Panel Thickness Capacity: Up to 1.0" (25.4mm) acrylic or glass panels
Primary Material Composition: High-Impact, Food-Grade Black uPVC
Gasket Material: High-density, saltwater-grade ethylene propylene diene monomer (EPDM) rubber
Thread Direction (Locking Nut): Left-Hand (Reverse) Threads
While most of our equipment carries a one-year manufacturer's warranty, consumable products like fish and coral foods are not covered under traditional warranty terms due to their perishable nature and varied storage conditions. However, we fully stand behind the quality of every product we sell. If you experience any issues with your food purchase shortly after receiving it, such as concerns about freshness, packaging integrity, or product quality, please contact us at [email protected]. We're committed to making it right and will work with you to resolve any problems quickly and fairly.
- Prior to installation, ensure the glass cutout edges are clean, smooth, and entirely free of chips or leftover silicone.
- Slide the rubber compression gasket onto the bulkhead body so it sits flush against the underside of the wide flange head.
- Place the gasket on the flange side only. The flange and gasket must go on the inside of the tank (wet side) if water is pulling through, or whichever side the flange sits against the glass. The nut must rest directly against the panel without a gasket on the dry side.
- Push the bulkhead body through the glass cutout.
- Thread the locking nut onto the bulkhead body from the opposite side. Note: These are reverse threads. Spin the nut counter-clockwise to tighten it.
- Hand-tighten the nut until it sits completely flush against the glass panel. Using bulk plumbing wrenches or channel locks, turn the nut an additional 1/4 to 1/2 turn.
- Do not over-tighten. Over-tightening will squeeze out or warp the rubber gasket, leading to slow, structural capillary leaks or potential cracking of acrylic/glass.
- Screw in your threaded internal and external fixtures using a small wrap of PTFE teflon tape or aquarium-safe thread paste. Turn male adapters in until hand-tight, plus 1 to 1-1/2 turns with a wrench.
Pro Tips:
- Never Place the Gasket on the Nut Side.
CRITICAL AQUARIUM SAFETY WARNING: The rubber gasket must always sit on the side of the panel with the flange head. If you place a gasket on the nut side, spinning the nut to tighten it will pinch, twist, and tear the rubber, creating immediate micro-gaps. The nut must spin directly against the bare glass or acrylic panel to achieve a true, stable physical lock.
- Do Not Over-Tighten Threaded Male Adapters. Since this bulkhead features plastic female threads, screwing in a plastic male adapter too tightly acts as a wedge and can split the bulkhead body. Wrap the male threads with 2 to 3 wraps of PTFE tape, thread it in by hand until snug, and tighten only slightly further with a wrench. Never use commercial liquid pipe dopes which can chemically weaken uPVC.
- Support Your Heavy Dry-Side Plumbing Runs. A 2-inch pipe filled with water is incredibly heavy. Even with threaded connections, you should always support the pipe weight using wall clamps or shelf brackets. Letting the weight of the pipe run hang directly on the bulkhead body puts severe leverage stress on the glass cutout, which can cause the gasket to unseat or crack your tank wall.