| The Hydrotek AUTOFLUSH Valve is the most advanced electronic flushing system in the industry today. By incorporating our field tested electronic circuitry and a slow-closing solenoid valve, Hydrotek has developed an innovative non-diaphragm, piston flushing mechanism that will provide years of dependable and trouble free service. The Hydrotek AUTOFLUSH system is completely automatic; there is no contact with any surface, no handle to push and it flushes only when it is used. It provides the ultimate in sanitary protection, the convenience of cleaner restroom facilities and the most efficient system in water conservation.
The HB8RFKC specifically is the retrofit kit.
The Hydrotek HB8RFKC is a battery operated, retrofit sensor flush valve that is the most dependable and versatile electronic flushing system in the industry today. Installation is quick and easy as it utilizes your existing Sloan, Delany, Zurn, or Toto stop valve, vacuum breaker and flush tube.
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MODEL HB8RFKC: Battery Operated Automatic Flush Valve Retrofit Kit For Closet (HB8RFKC-C) Or Urinal (HB8RFKC-U).
Piston-operated, slow-closing, Closet or Urinal Retrofit Flush Valve with electronic sensor control. Stainless Steel piston filter screen is self-cleaning and VSI Silicone Elastomer piston seals are unaffected by exposure to chlorine, chloramines, or ammonia. ACCU SENSE Sensor, Sensor range and gallons per flush are preset and adjustable, with function and low battery indicator light. Standard equipped with battery holders and four (4) AA Alkaline Batteries. Features include: chrome plated brass cap and valve body that can be field adjusted for left or right inlet, ADA compliant mechanical manual flush button, utilizing existing stop valves, vacuum breakers / flush tubes. Retrofits most manual flush valve installations including Sloan, Zurn, Toto and Delany. Note: Delany retrofit kit requires special ground joint tailpiece.
This model is offered in the following options and list prices:
| HB8RFKC-C | 1.6 GPF Closet (Retrofit Sloan, Toto, and Zurn) | $337.72 |
| HB8RFKC-U | 1.0 GPF Urinal (Retrofit Sloan, Toto, and Zurn) | $337.72 |
| HB8RFKC-CD | 1.6 GPF Closet (Retrofit Delany) | $337.72 |
| HB8RFKC-UD | 1.0 GPF Urinal (Retrofit Delany) | $337.72 |
SOLAR RETROFIT FLUSH VALVES
| HB8RSLE-C | 1.6 GPF Closet (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8RSLE-U | 1.0 GPF Urinal (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8RSLE-CD | 1.6 GPF Closet (Retrofit Delany) | $364.74 |
| HB8RSLE-UD | 1.0 GPF Urinal (Retrofit Delany) | $364.74 |
Also available in the following Water Conservation models:
| HB8-R16DF | 1.6 / 1.0 GPF “Dual Flush” Closet (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8-R128DF | 1.28 / 1.0 GPF “Dual Flush” Closet (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8-R128 | 1.28 GPF Closet (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8-R05 | 0.5 GPF Urinal (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8-R0125 | 0.125 GPF (1/8 Gallon per Flush) Urinal (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8-R16DFD | 1.6 / 1.0 GPF “Dual Flush” Closet (Retrofit Delany) | $364.74 |
| HB8-R128DFD | 1.28 / 1.0 GPF “Dual Flush” Closet (Retrofit Delany) | $364.74 |
| HB8-R128D | 1.28 GPF Closet (Retrofit Delany) | $364.74 |
| HB8-R05D | 0.5 GPF Urinal (Retrofit Delany) | $364.74 |
SOLAR RETROFIT FLUSH VALVES
| HB8SLE-R16DF | 1.6 / 1.0 GPF “Dual Flush” Closet (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8SLE-R128DF | 1.28 / 1.0 GPF “Dual Flush” Closet (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8SLE-R128 | 1.28 GPF Closet (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8SLE-R05 | 0.5 GPF Urinal (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8SLE-R0125 | 0.125 GPF (1/8 Gallon per Flush) Urinal (Retrofit Sloan, Toto, and Zurn) | $364.74 |
| HB8SLE-R16DFD | 1.6 / 1.0 GPF “Dual Flush” Closet (Retrofit Delany) | $364.74 |
| HB8SLE-R128DFD | 1.28 / 1.0 GPF “Dual Flush” Closet (Retrofit Delany) | $364.74 |
| HB8SLE-R128D | 1.28 GPF Closet (Retrofit Delany) | $364.74 |
| HB8SLE-R05D | 0.5 GPF Urinal (Retrofit Delany) | $364.74 |
The following accessories are available for this model:
| H8-01-0102A | Filter Screen Assembly – H/HB 8, 8C | $9.60 |
| H8-01-0104C | Rubber Seat – H/HB 8C | $4.13 |
| H8-01-0108 | Control Disc Rubber Skirt – H/HB 8 | $13.01 |
| HC-0820C | Angle Stop Repair Kit | $7.96 |
| HC-082A | Angle Stop – 3/4″ | $41.13 |
| HC-082B | Angle Stop – 1″ | $41.13 |
| HC-084 | Sweat Kit – 3/4″ | $12.71 |
| HC-084B | Sweat Kit – 1 1/2″ | $14.50 |
| HC-086 | Vacuum Breaker | $5.83 |
| HC-086A-24 | 1 1/2″ Flush Tube with Vacuum Breaker | $37.00 |
| HC-086B-24 | 3/4″ Flush Tube with Vacuum Breaker | $37.00 |
| HC-086D | Trap Primer Assembly with Vacuum Breaker (1 1/2″ Rough In) | $51.69 |
| HC-086SRPS | Split Ring Pipe Support | $31.63 |
| HC-089 | Manual Push Button Assembly | $43.65 |
| HC-093A | 3/4″ Top Spud Assembly | $10.73 |
| HC-093B | 1 1/4″ Top Spud Assembly | $10.73 |
| HC-093C | 1 1/2″ Top Spud Assembly | $10.73 |
| HCC-005-04A | Whole Piston Assembly | $11.75 |
| HCC-080A | Control Module (H-8000C) **Closet or Urinal? | $167.71 |
| HCC-080B | Control Module (HB8RFKC, HB-8000C) **Closet or Urinal? | $167.71 |
| HCC-080CVRB | 7″ x 7″ Wall Plate with Button (for Concealed Closet) | $285.14 |
| HCC-080E | Sensor Eye & Cable (HB8RFKC, H/HB-8000C) | $71.67 |
| HCC-102 | Control Disc (H/HB-8000C) | $46.08 |
| HCC-104A | Battery Holder | $6.00 |
| HCC-106 | Repair Kit, Solenoid Valve (HB8RFKC, H/HB-8000C) | $35.96 |
- Quick Overview of Features [PDF 694KB]
- Product Features & Specifications (Submittal Sheet) [PDF 743KB]
Piston-operated, slow-closing, closet flush valve with electronic sensor control. Stainless Steel piston filter screen is self-cleaning and VSI Silicone Elastomer piston seals are unaffected by exposure to chlorine, chloramines, or ammonia. ACCU SENSE Sensor, Sensor range and gallons per flush are preset and adjustable, with function and low battery indicator light. Standard equipped with battery holders and four (4) AA Alkaline Batteries. Features include: chrome plated brass cap and valve body that can be field adjusted for left or right inlet, ADA compliant mechanical and manual flush button, adjustable tailpiece, high back pressure vacuum breaker, spud coupling, wall & spud flanges, sweat solder kit and vandal resistant 3/4 inch I.P.S. angle stop and 3/4 inch top spud.

