SKU: 88519985

AVG PTR15-850-LF 15mm 850kPa PTR Pressure Temperature Relief Valve

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Description

AVG PTR15-850-LF 15mm 850kPa PTR Pressure Temperature Relief ValveOverview Australian Valve Group (AVG) PTR15 850 LF 15mm (1 2") 850kPa PTR Pressure and Temperature Relief Valve (also known as TPR valve) is cross compatible with other popular makes such as Reliance HT55 PTR valve with same fitments and functions. During the hot water services' heating cycles, the volume of water will expand as the temperature increases. This volume expansion creates excessive pressure inside the water cylinder and must be regulated.

Overview

Australian Valve Group (AVG) PTR15-850-LF 15mm (1/2") 850kPa PTR Pressure and Temperature Relief Valve (also known as TPR valve) is cross compatible with other popular makes such as Reliance HT55 PTR valve with same fitments and functions.

During the hot water services' heating cycles, the volume of water will expand as the temperature increases. This volume expansion creates excessive pressure inside the water cylinder and must be regulated. The AVG PTR valve is designed to regulate and relieve the pressure in hot water services by dripping in a controlled manner. 2-5L a day of dripping is normal, depending on the hot water usage and the amount of heating going into the water.

The AVG PTR valve is also a mechanical protection device for the hot water services. In rare occasions of faulty thermostat or heating element, the hot water service can overheat and build dangerously high pressures. When the AVG PTR valve senses this abnormally high temperature and pressure, it will dump large amounts of water in hundreds of liters for an emergency pressure relief.

A functioning PTR valve is a requirement by law in Australia for safety and the AVG PTR  valve is approved under the Watermark standard. The AVG PTR valve comes with an insulation jacket and allows for a professional look and minimal heat loss.

A PTR valve usually has a life span about 5 years and needs replacing if you notice excessive water leakage in a stream instead of a controlled dripping. The AVG PTR valve is cross compatible with many other brands such as Reliance, Tomson, Nefa and Reflex.

The AVG PTR valve fits perfectly with mainstream heat pump, solar, electric and gas storage water heater brands such as Rheem, Vulcan, Rinnal, Dux, Aquamax, Thermann, Apricus and Solahart. 

Technical Details

  • Brand: Australian Valve Group (AVG)
  • Model: PTR15-850-LF
  • Watermark License Number: 2639
  • Expansion Rating: 10 kW 
  • Pressure Rating: 850 kPa
  • Temperature Rating: 99°C
  • Thread Size: 1/2" BSP (15mm) Male MI thread and female FI thread
  • Thread Size Physical Measurements: 20.995mm external male and internal female thread diameter (refer to the BSP sizing chart in the photo gallery)
  • Insulation Jacket Included 
  • Material: DR Brass
  • Intended Use: Electric tanks, solar tanks, gas storage tanks and heat pumps
  • SKU: AVG-PTR15-850-LF

Package Contents

  • AVG PTR15-850-LF 15mm (1/2") 850kPa PTR Valve with insulation jacket
  • Package Weight: 350g

Shipping Notes
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Exchange/Return Notes
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  • Final sale items are not eligible for returns or exchanges.
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SKU: 88519985

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Wendy Gladhill
Waukegan, US
★★★★★ 4
It gets the job done.
Color: Silver, Material Type: Stainless Steel
These some on a flat piece of cardboard, and I was concerned. It goes together well, and has held up to Highschooler use for a month so far. It looks nice, but is nothing fancy. If you are looking for any sort of resistance for your paper towel for tearing, this product probably isn't for you. It is weighted enough for it to not fall over, it looks nice enough to be fine but not nice enough to want to steal. Exactly what I was looking for. If you are searching for the perfect paper towel holder... you probably will take issue with this one. If you just need a new paper towel holder, this one might do.
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Reviewed in the United States on January 29, 2026
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MARY LISCOMBE
Battle Creek, US
★★★★★ 5
Paper towel holder
Color: Black, Material Type: Stainless Steel
Little flimsy not what it appears to look like but it gets the job done
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Reviewed in the United States on March 24, 2026
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Dandy
Cuba, US
★★★★★ 3
Bottom screw will rust and permanently stain counter
Color: Black, Material Type: Stainless Steel, Color: Black, Material Type: Stainless Steel
Besides the ungalvanized or stainless steel bottom screw that rusts at the first sign of moisture this product has held up incredibly well. I've used the product for 3 years and that is the only problem. I'm probably going to get a deduction in my security deposit for the rust stains that have permeated the countertop. The rest of the product is really well made and holds up well
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Reviewed in the United States on March 22, 2026
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Deborah V.
Alexandria, US
★★★★★ 5
Crafting Convenience: Sturdy and Stylish One-Handed Towel Holder for Creative Spaces
Color: Black, Material Type: Stainless Steel
Thisit has become a great addition to my craft area. The struggle to find a convenient place for paper towels is real, especially when crafting can get a bit messy. Prior attempts with a magnetic holder fell short, as it couldn't support the weight of a full paper towel roll. The promise of a one-handed dispensing solution was intriguing and seemed like the perfect fit for my needs. While I can't unequivocally say this holder allows for flawless one-handed dispensing – it seems the success of that feature might depend on the angle at which the towel is torn – it's still a significant upgrade from my previous setup. The sturdy stand ensures the towels are always within reach, without the risk of the holder tipping over or the roll coming loose. Apart from its functionality, the aesthetic aspect of this towel holder is a notable advantage. Its minimalist design doesn't just save space; it also contributes to the overall look and feel of my crafting space. The wrought iron style is a perfect match with my other accessories, creating a cohesive and stylish environment. In conclusion, this towel holder is more than just a functional tool; it's a stylish addition that enhances the convenience and appearance of my crafting area. Its sturdy build, practical design, and complementary style make it a winner in my book.
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Reviewed in the United States on January 25, 2024
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DSaT
Belleville, US
★★★★★ 5
Nice quality and sleek paper towel holder!
Color: White, Material Type: Stainless Steel
Live the sleekness and quality of this paper towel holder. Blends in great with my white backsplash!
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Reviewed in the United States on June 1, 2026

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