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
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 88519985

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Vaishali Gajjar
Lake Worth, US
★★★★★ 1
Poor quality
Color: Coffee
Zipper broke within 15 days of use
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 11, 2026
C
C. J. B.
Belleville, US
★★★★★ 5
Real leather, soft and lightweight
Color: Brown, Color: Brown
This medium sized leather tote bag is well made, with tight stitching; heavy duty, gunmetal colored hardware; and a thick, dark gray fabric lining on the inside. There are 2 short, rounded handles that do not fold down, and a narrow, flat, detachable crossbody strap that can be adjusted in length. The style is simple and classic, with a hand-dyed brown finish that will go well with most outfits. It's versatile, being suitable for work or everyday use. It can carry a small laptop or tablet, along with other essential items. There are no outside pockets, but inside there are several. The central compartment is spacious, with 2 slip pockets on one side. There are also 2 zippered pockets, with a large open pocket separating them. The top of the bag has a full, metal zipper that seems good quality. This bag is very attractive as well as functional, and though the leather feels lightweight the bag seems durable. Its listed price is a little high for my budget, but a coupon offer currently makes it a good value. I was very surprised that there is no logo or branding of any kind visible on the outside of this bag, and only one name label stitched to a pocket on the inside. Many bags I see have prominent names, symbols, or initials on the outside, and sometimes all over the inside lining as well. The simplicity of this bag is a refreshing change as it lets the quality speak for itself. I like it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 5, 2026
C
Cassandra Complex
Bozeman, US
★★★★★ 3
Great bag
Color: Brown, Color: Brown
This is a wonderful leather bag. It can be carried by handles or worn crossbody. It fits my 13" MacBook Pro perfectly though it doesn't have any particular padding to protect a laptop. I have a couple of nitpicks though for a bag that costs $98. 1/It's a shame that the handles can't lay down or disappear in some way when not in use. They just look a little goofy when you wear the bag across your body. And 2/the stitching is a little weird. The exterior shows the stitching for the inside pocket and I don't know that it's necessary. All in all it's a good bag but if I could return it I would consider doing so because of the way the handles stick up when worn crossbody. I do think, ultimately that's a dealbreaker for me.
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Reviewed in the United States on December 23, 2025
K
Kathy
Birmingham, US
★★★★★ 5
This Bag Is Unbelievable - Serious Business
Color: Brown, Color: Brown
I’m a self-admitted bag enthusiast, and this one genuinely surprised me. I wasn’t familiar with the brand, but the quality is immediately apparent. The leather is soft yet substantial, giving it a premium feel without seeming fragile or flimsy. The stitching is impeccable, and the front and back are cleanly designed with no unnecessary frills—just a timeless, well-constructed silhouette. It’s the kind of bag that people notice, whether you’re carrying it or someone sees it from across the room. The strap was neatly packaged inside, and everything arrived in perfect condition. I looked it over carefully and couldn’t find a single flaw. In my opinion, this is a near-perfect everyday bag and an impressive value for the quality. *** Photos are front of bag (same as back), side of bag & bottom of bag. As you can see the stitching, as well as everything else, is quite impressive. Love this bag!
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Reviewed in the United States on December 30, 2025
H
HollyDEE
Fort Morgan, US
★★★★★ 4
Gorgeous Color!
Color: Coffee, Color: Coffee
I am very happy with the color of this purse the inside pockets and zipped pockets, a total of 4, allows for neat organization of all my items such as phone, cosmetics, sunglasses, tissues, perfume, mints and etc... I love the gun metal colored hardware. The zippers move smoothly. The crossbody strap is long enough for my 6' frame and sits right at my hip when I use the last buckle hole. All the stitching is complete and tight. Speaking of stitching, I removed a star because the inside pockets are sewn on and shows on the back of the purse. I don't like having to check if my purse is facing the right way. For the price of this purse the stitching should not be showing. The interior lining is a cloth-like fabric. The inside zipped pockets are full size and lay on top of each other. This is different from what I've seen in other purses. When the purse is full, the top pocket slightly covers the main compartment bottom from view. I will be sure to put something somewhat flat in that pocket to avoid this. There is no offensive odor from shipping. Because of the stitching issue, I cannot recommend to others without point this out.
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Reviewed in the United States on December 31, 2025

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