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Commercial Pool and Spa Supplies

6" FVS Single Arm Float Valve - Open Pipe

6" FVS Single Arm Float Valve - Open Pipe

6FVS-OP

$1,671.00
$1,671.00
Sale Sold out
Shipping calculated at checkout.

The 6" FVS Single Arm Float Valve – Open Pipe (Float Valve Single-arm, 6-inch nominal pipe size) is a heavy-duty mechanical water-level control valve engineered for high-flow commercial aquatic surge tanks, collector pits, balance tanks, and open-channel gravity return systems. Installed directly onto an open-ended 6-inch horizontal or downward-turned gravity return pipe inside a surge pit, the valve automatically modulates or shuts off gravity flow from pool gutters and skimmers as water rises in the tank—preventing surge tank overflow during heavy bather loads while maintaining flooded suction head for the main circulation pumps.

Parameter Specification
Equipment Reference 6" FVS Single Arm Float Valve – Open Pipe (Commercial Surge Tank Level Control)
Nominal Pipe Size 6.0 in (150 mm / DN150)
Inlet Connection Type Open-Pipe Mount: Female Slip Socket (Schedule 40/80 IPS, 6.625" ID socket) or Clamp-On / Locking Sleeve for direct mounting onto bare 6.0" nominal (6.625" actual OD) open pipe end
Discharge Configuration Unobstructed Open-Discharge / Free-Fall Port (zero downstream backpressure)
Actuation Mechanism Mechanical Single-Arm Lever Linkage (direct proportional buoyancy actuation; requires no electricity or compressed air)
Valve Body & Housing Material Heavy-duty machined Schedule 80 PVC, CPVC, or molded high-impact ABS / FRP composite
Pivot Arm & Linkage Hardware 316 Marine-Grade Stainless Steel arm, clevis pins, and locknuts (eliminates galvanic corrosion and chlorine stress-cracking)
Float Ball / Buoyancy Element Heavy-wall seamless Polyethylene (HDPE), Polypropylene, or 316 Stainless Steel spherical/cylindrical float (typically 12" to 14" diameter for increased buoyancy torque on a 6" bore)
Seat & Disc Seal Material Replaceable thick-wall EPDM or Neoprene elastomer disc / flapper seal for drip-tight shutoff
Recommended Gravity Flow Capacity Approx. 400 to 800 US gpm (90.8 to 181.7 m³/h) at standard gravity head (1 to 3 ft water column)
Maximum Operating Pressure 15 to 20 psi (1.03 to 1.38 bar) — engineered specifically for low-head gravity gutter and main-drain lines
Operating Temperature Range 32°F to 120°F (0°C to 49°C)
Level Adjustment Range Adjustable arm pitch / float rod indexing allows field calibration of shutoff water elevation (+/- 4 to 8 in)
Compliance / Standards NSF/ANSI Standard 50 compatible materials; meets Model Aquatic Health Code (MAHC) surge tank overflow protection guidelines

Hydraulic & Mechanical Operating Details

  • High-Volume Gravity Modulation: Scaling up from the 4" model to a full 6-inch bore more than doubles the cross-sectional flow area, accommodating high-volume perimeter gutter returns without creating upstream hydraulic backup in the pool deck troughs.

  • Proportional Float Action: As surge tank water drops during pump startup or heavy backwash drawdowns, the float descends, swinging the single pivot arm downward to open the 6" valve bore completely. As water returns from the pool and raises the tank level, buoyancy lifts the oversized float to progressively throttle and seat the EPDM disc.

  • Open-Pipe Installation: Designed specifically for installations where the 6" gravity return pipe terminates cleanly inside the surge tank wall without a bolted flange. The valve hub slips directly over the 6" PVC pipe stub and is secured via solvent cement or stainless steel mechanical locking screws.

  • Shipping Weight: Approx. 20 to 28 lbs (9.1 to 12.7 kg) complete with 6" valve body, 316 SS single pivot arm, adjustable linkage hardware, and oversized float ball.

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