1/2in Thread x Thread PVC Bulkhead
SKU: RF-92005-TT
- Double-Threaded Serviceable Profile: Formed with precision internal 1/2" Female Iron Pipe Thread (FPT) sockets inside both the flange face and the rear tail section for fully mechanical, cement-free assembly.
- Compact, High-Flow Profile: Ideal for low-profile auxiliary lines, automated fresh water top-off networks, security overflow channels, and localized media reactor feeds.
- Premium Ribbed Compression Gasket: Supplied with an extra-pliable, heavy-duty black rubber gasket that seats flush against smooth surfaces to absorb dynamic tension and eliminate micro-leaks.
- Left-Hand Reverse Thread Casing: Formed with specialized reverse exterior body threads to ensure the locking nut remains firmly tightened when screwing internal adapters clockwise.
- 100% Aquarium and Reef Safe: Injection-molded from specialized high-purity unplasticized polymers that will not leach chemical plasticizers or toxic heavy metals into sensitive coral systems.
CoralVue 1/2 Inch Thread x Thread Black PVC Aquarium Bulkhead Fitting (SKU: RF-92005-TT)
The CoralVue 1/2 Inch Thread x Thread Black PVC Aquarium Bulkhead Fitting (SKU: RF-92005-TT) is a crucial mechanical fluid management transition component engineered specifically to establish watertight, leak-proof paths across glass overflow boxes, acrylic display walls, plastic sump basins, and water reservoirs. Safely routing water across a structural wall barrier is one of the highest stress vulnerabilities in any custom filtration network. Standard residential light-weight white plumbing adapters feature straight structural paths that are prone to dynamic twisting and seal failures when torque is applied. This specialized black aquatic bulkhead isolates those connection stresses, using an optimized low-profile design and custom-molded compression gasket to keep your floor completely dry.
Engineered to fit North American domestic drilling standards, this bulkhead features a highly versatile double female threaded connection architecture. The wet side front flange features internal 1/2" Female Iron Pipe Threads (FIP / FPT), making it a perfect match for standard male threaded suction screens (such as CoralVue item code RF-92005-TS screen counterparts), intake strainer baskets, or directional lock-line nozzles. Crucially, the dry side exterior tailpiece also features an identical internal 1/2" female threaded port, allowing you to screw in male threaded PVC pipe adapters, flexible ball valves, or structural transitions. This eliminates the need for liquid PVC primers and solvent glues entirely on the pass-through body, making the entire bulkhead easily removable and reconfigurable if you decide to modify your aquarium filtration loop down the line.
Key Features
Left-Hand Reverse Threads Stop Slippage: Engineered with specialized left-hand reverse exterior tracks on the bulkhead nut, ensuring that tightening a male adapter clockwise into the front threads actually pulls the outer locknut tighter against the glass rather than loosening it.
100% Glue-Free Reconfiguration: Internal female threads on both faces allow you to completely tear down, clean, or relocate your hard-plumbed filtration system without having to cut pipes apart with a saw.
Sits Flush Inside Overflow Boxes: The compact, black injection-molded design minimizes physical space inside tight overflow weirs, blending seamlessly into dark aquarium backgrounds.
(Note: This retail SKU contains (1) standalone CoralVue 1/2" Thread x Thread black PVC bulkhead assembly, which includes (1) double-threaded body flange, (1) reverse-threaded locking nut, and (1) pre-fitted compression rubber gasket. Thread tapes, male plumbing fittings, and structural pipes are sold under separate product categories).
What’s Included:
(1) CoralVue RF-92005-TT 1/2" Thread x Thread Black PVC Bulkhead Body Flange
(1) Reverse-Threaded Clamping Hex Nut
(1) Premium Self-Seating Black Rubber Compression Gasket
Technical Specs:
Official Manufacturing Title: 1/2" Black PVC Tank Fitting (Thread x Thread)
SKU / Factory Part Identifier: RF-92005-TT
Front Flange Internal Socket Profile: 1/2" Female National Pipe Thread (FPT NPT-Spec)
Rear Tailpiece Internal Socket Profile: 1/2" Female National Pipe Thread (FPT NPT-Spec)
External Body Thread Direction: Left-Handed Reverse Clamping
Required Tank Hole Drill Diameter: 1-1/8" to 1-3/16" (28mm - 30mm Core Range)
Maximum Tank Wall Thickness Pass: Clamps securely on materials up to 0.65" Thick
Primary Injection Mold Color: Matte Marine Black
Official Compliance Standards: ASTM D1784 Material Spec, NSF Non-Toxic Certified
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.
- Verify your drilled hole dimensions. Ensure the tank opening measures between 1-1/8" and 1-3/16" and that the glass or acrylic surface is completely free of sharp burrs or chips.
- Clean the area around the hole thoroughly on both sides of the tank wall using fresh water and a soft lint-free towel to remove all dust, glass dust, or plastic shavings.
- Slide the pliable black rubber compression gasket over the threaded bulkhead shaft, pushing it completely flush against the broad front flange shoulder.
- Insert the bulkhead shaft through the hole from the inside of the tank. The wide flange face and rubber gasket MUST sit on the wet water side of the reservoir. The hard nut always sits on the dry side.
- Thread the hard plastic locknut onto the shaft from the dry exterior side by spinning it counter-clockwise (due to the reverse threads safety feature) until it rests flat against the dry wall.
- Hand-tighten the locknut firmly, then use a specialized bulkhead wrench to turn it an additional 1/4 to 1/2 turn. Do not over-torque, as excess stress can fracture glass or pinch the rubber gasket out of its alignment track.
- Gasket Placement Rule: The Rubber Gasket Always Goes on the Flange Side.
CRITICAL AQUARIUM PLUMBING WARNING: No matter if you install this bulkhead vertically through a tank bottom or horizontally through a back overflow wall, the black rubber gasket must always rest directly between the wide molded body flange and the glass. Never place the rubber gasket on the side with the spinning locking hex nut. Spinning the hard plastic nut directly against a dry rubber gasket will twist, tear, or warp it out of its tracking groove, causing a permanent leak.
- Wrap Exterior Pipe Adapters with 2-3 Wraps of Thread Tape—No Glue! When threading your external lines into the rear 1/2" FPT tailpiece, use standard male threaded (MPT) plumbing adapters. Wrap the male threads with 2 to 3 clean layers of standard Teflon thread tape before screwing them in. Because this port is fully threaded, never use liquid PVC primers or solvent glues on this bulkhead port. Using solvent glue inside a threaded connection will chemically dissolve the thread tracks, rendering the fitting useless and causing immediate leaks.
- Do Not Over-Tighten Internal or External Connections. Because the internal thread channels on both sides are under low gravity or standard sump return pressures, you only need hand-tight pressure plus a light turn to seal them. Avoid using heavy plumbing pipe wrenches or applying thick plumbing paste dopes. Over-packing internal plastic threads or using high mechanical advantage tools creates a powerful wedge effect when screwed together, which can split the plastic bulkhead walls directly along their factory mold lines.