Spears 9321 Series Double Flange Tank Adapter
Spears 9321 Series double flange tank adapters earn a top spot for broad compatibility with standard PVC systems and widespread availability, making them the practical choice for construction and maintenance teams working on double flange bulkhead fittings. They balance low installed cost and easy interchangeability better than premium European options like Georg Fischer, though they typically trade off some of the higher-end material certifications and the chemical resistance of polypropylene-based fittings such as Banjo's TF200. For projects where system compatibility and supply-chain convenience reduce total project cost, the Spears 9321 is often the most economical choice.
Chemical-hardy hero
Low-profile snug
Chemical-hardy hero
Low-profile snug
Review Summary
"Generally praised for reliable, leak-free performance and straightforward solvent-weld installation in PVC systems. A minority of users report cracking or failure if overtightened or used beyond rated pressure/temperature limits."
Glue-and-go charm
NSF-compatible PVC construction for potable and general tank applications.
Glue-and-go charm
NSF-compatible PVC construction for potable and general tank applications.
Increased Safety & Security
Time-Saving Convenience
Spears 9321 Series double flange tank adapters earn a top spot for broad compatibility with standard PVC systems and widespread availability, making them the practical choice for construction and maintenance teams working on double flange bulkhead fittings. They balance low installed cost and easy interchangeability better than premium European options like Georg Fischer, though they typically trade off some of the higher-end material certifications and the chemical resistance of polypropylene-based fittings such as Banjo's TF200. For projects where system compatibility and supply-chain convenience reduce total project cost, the Spears 9321 is often the most economical choice.
Chemical-hardy hero
Low-profile snug
Glue-and-go charm
NSF-compatible PVC construction for potable and general tank applications.
Double-flange design provides secure mounting and minimizes stress on tank walls.
Chemical-hardy hero
Low-profile snug
Glue-and-go charm
NSF-compatible PVC construction for potable and general tank applications.
Double-flange design provides secure mounting and minimizes stress on tank walls.
$8-45 CAD
Hayward BFA Series Bulkhead Fitting
Hayward BFA Series bulkhead fittings are positioned as the value-oriented, application-focused option—especially strong for pool, spa and recreational water systems—thanks to corrosion-resistant construction and simple installation. Compared with Spears and LASCO, Hayward emphasizes user-friendly features and competitive pricing for the leisure market, though it may lack the broader industrial material options and higher pressure ratings found in LASCO schedule 80 or the premium engineering and certifications of Georg Fischer. For owners and installers in the water-treatment and pool sectors, Hayward often offers the best balance of durability and upfront cost.
Pool-grade pro
Tool-free twist
Pool-grade pro
Tool-free twist
Review Summary
"Users rate it highly for robust construction and dependable sealing in pool and spa plumbing, with easy installation. Some buyers note it is pricier than generic fittings and O-rings may need replacement after long service."
UV-tanned tough
Designed specifically for pool and spa plumbing with chlorinated-water compatibility.
UV-tanned tough
Designed specifically for pool and spa plumbing with chlorinated-water compatibility.
Recreational Enjoyment
Increased Safety & Security
Time-Saving Convenience
Hayward BFA Series bulkhead fittings are positioned as the value-oriented, application-focused option—especially strong for pool, spa and recreational water systems—thanks to corrosion-resistant construction and simple installation. Compared with Spears and LASCO, Hayward emphasizes user-friendly features and competitive pricing for the leisure market, though it may lack the broader industrial material options and higher pressure ratings found in LASCO schedule 80 or the premium engineering and certifications of Georg Fischer. For owners and installers in the water-treatment and pool sectors, Hayward often offers the best balance of durability and upfront cost.
Pool-grade pro
Tool-free twist
UV-tanned tough
Designed specifically for pool and spa plumbing with chlorinated-water compatibility.
Includes gasket and locking nut for reliable, watertight installation.
Pool-grade pro
Tool-free twist
UV-tanned tough
Designed specifically for pool and spa plumbing with chlorinated-water compatibility.
Includes gasket and locking nut for reliable, watertight installation.
Georg Fischer Type 317 Double Union Tank Connector
Georg Fischer Type 317 double union tank connectors represent the market-leading, precision-engineered choice for industrial and chemically demanding applications, offering tight tolerances, traceable quality, and broad material options that justify their premium price versus commodity fittings. Technically superior for critical systems, GF connectors deliver reliability and certification support that DIY and budget-oriented brands like LASCO or Hayward usually don’t provide, although that comes with higher capital cost and sometimes greater lead time. When specification compliance, longevity and minimized lifecycle risk matter most for double flange bulkhead fittings, GF is the professional standard.
Union-ready clutch
Precision-seal nerd
Union-ready clutch
Precision-seal nerd
Review Summary
"Viewed as an industrial-grade, well-made double union connector with excellent chemical resistance and easy maintenance; buyers appreciate its longevity. The main complaint is a higher price compared with commodity fittings."
Modular-install joy
Double-union design permits removal of fittings without rotating the piping system.
Modular-install joy
Double-union design permits removal of fittings without rotating the piping system.
Skill Development & Mastery
Increased Safety & Security
Time-Saving Convenience
Georg Fischer Type 317 double union tank connectors represent the market-leading, precision-engineered choice for industrial and chemically demanding applications, offering tight tolerances, traceable quality, and broad material options that justify their premium price versus commodity fittings. Technically superior for critical systems, GF connectors deliver reliability and certification support that DIY and budget-oriented brands like LASCO or Hayward usually don’t provide, although that comes with higher capital cost and sometimes greater lead time. When specification compliance, longevity and minimized lifecycle risk matter most for double flange bulkhead fittings, GF is the professional standard.
Union-ready clutch
Precision-seal nerd
Modular-install joy
Double-union design permits removal of fittings without rotating the piping system.
Constructed from high-performance plastics for superior chemical and temperature resistance.
Union-ready clutch
Precision-seal nerd
Modular-install joy
Double-union design permits removal of fittings without rotating the piping system.
Constructed from high-performance plastics for superior chemical and temperature resistance.
$60-180 CAD
Banjo TF200 Polypropylene Bulkhead Tank Fitting
Banjo TF200 polypropylene bulkhead tank fittings stand out for excellent chemical resistance and a cost-effective profile for handling aggressive fluids—making them a preferred option where solvent or acidic media rule out standard PVC parts. Financially, TF200s are often more economical than specialty metallic solutions while offering superior corrosion performance compared with LASCO’s PVC Schedule 80 or Spears’ standard PVC adapters, though they may not carry some of the industrial certifications of Georg Fischer. For chemical processing and agricultural applications that need durable, low-cost chemical compatibility in a double flange configuration, Banjo’s TF200 is a top practical choice.
Polypropylene power
Wide-flow winner
Polypropylene power
Wide-flow winner
Review Summary
"Valued for good chemical resistance, light weight, and strong value for agricultural and chemical tank use. Some users report occasional O-ring wear or minor leaks if not properly seated during installation."
Corrosion-proof pal
Made from polypropylene for excellent resistance to a wide range of chemicals.
Corrosion-proof pal
Made from polypropylene for excellent resistance to a wide range of chemicals.
Increased Safety & Security
Time-Saving Convenience
Banjo TF200 polypropylene bulkhead tank fittings stand out for excellent chemical resistance and a cost-effective profile for handling aggressive fluids—making them a preferred option where solvent or acidic media rule out standard PVC parts. Financially, TF200s are often more economical than specialty metallic solutions while offering superior corrosion performance compared with LASCO’s PVC Schedule 80 or Spears’ standard PVC adapters, though they may not carry some of the industrial certifications of Georg Fischer. For chemical processing and agricultural applications that need durable, low-cost chemical compatibility in a double flange configuration, Banjo’s TF200 is a top practical choice.
Polypropylene power
Wide-flow winner
Corrosion-proof pal
Made from polypropylene for excellent resistance to a wide range of chemicals.
Compact bulkhead form with integrated nut and gasket for secure, leak-free mounting.
Polypropylene power
Wide-flow winner
Corrosion-proof pal
Made from polypropylene for excellent resistance to a wide range of chemicals.
Compact bulkhead form with integrated nut and gasket for secure, leak-free mounting.
Schedule 80 PVC Double Threaded Bulkhead by LASCO
LASCO Schedule 80 PVC double threaded bulkhead fittings rank as the heavy-duty, budget-friendly option for higher-pressure PVC systems, delivering a thicker-wall construction and improved pressure capability compared with common schedule 40 adapters like many Spears parts. They provide one of the most economical routes to a robust double flange solution for water and non-aggressive chemical services, though polypropylene options such as Banjo’s TF200 offer better chemical resistance and Georg Fischer provides higher-end material certification and precision fit. If the priority is pressure rating and upfront affordability within PVC piping systems, LASCO’s Schedule 80 parts are a strong market choice.
Pressure-brawny boss
Thick-wall guardian
Pressure-brawny boss
Thick-wall guardian
Review Summary
"Schedule 80 construction is commonly praised for extra strength and durability compared with schedule 40; works well in heavier-duty applications. Several users caution against overtightening and report occasional thread fitment issues on older tanks."
Threaded-lock hug
Schedule 80 PVC body offers higher pressure rating and thicker walls than Schedule 40.
Threaded-lock hug
Schedule 80 PVC body offers higher pressure rating and thicker walls than Schedule 40.
Increased Safety & Security
Time-Saving Convenience
LASCO Schedule 80 PVC double threaded bulkhead fittings rank as the heavy-duty, budget-friendly option for higher-pressure PVC systems, delivering a thicker-wall construction and improved pressure capability compared with common schedule 40 adapters like many Spears parts. They provide one of the most economical routes to a robust double flange solution for water and non-aggressive chemical services, though polypropylene options such as Banjo’s TF200 offer better chemical resistance and Georg Fischer provides higher-end material certification and precision fit. If the priority is pressure rating and upfront affordability within PVC piping systems, LASCO’s Schedule 80 parts are a strong market choice.
Pressure-brawny boss
Thick-wall guardian
Threaded-lock hug
Schedule 80 PVC body offers higher pressure rating and thicker walls than Schedule 40.
Double-threaded design makes installation simple and provides strong mechanical hold.
Pressure-brawny boss
Thick-wall guardian
Threaded-lock hug
Schedule 80 PVC body offers higher pressure rating and thicker walls than Schedule 40.
Double-threaded design makes installation simple and provides strong mechanical hold.
$12-50 CAD