SKU: 74226330762

APO ECV15/700 15mm 700kPa ECV Expansion Control Valve

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Description

APO ECV15/700 15mm 700kPa ECV Expansion Control ValveOverview The APO ECV15 700 15mm (1 2") 700kPa ECV expansion control valve is used to regulate the water pressure inside hot water services, including heat pumps, electric, gas storage and solar water heaters across all mainstream brands in Australia such as Rheem, Vulcan, Rinnal, Dux, Aquamax, Thermann, Apricus and Solahart. The APO ECV expansion control valve features the same threads, fitments and similar physical sizes with many other valve

Overview

The APO ECV15/700 15mm (1/2") 700kPa ECV expansion control valve is used to regulate the water pressure inside hot water services, including heat pumps, electric, gas storage and solar water heaters across all mainstream brands in Australia such as Rheem, Vulcan, Rinnal, Dux, Aquamax, Thermann, Apricus and Solahart. 

The APO ECV expansion control valve features the same threads, fitments and similar physical sizes with many other valve manufacturers such as Reliance H50, AVG, Tomson, Nefa and Reflex. This makes the APO ECV valve a perfect direct replacement to an existing valve in an old hot water heater. 

The ECV expansion control valve regulates the pressure caused by water volume expansions during normal heating cycles in a hot water service. The ECV expansion control valve relieves this increase in pressure by a controlled water dripping into a drain line typically of 2 to 5 liters per day depending on the hot water usage.

The ECV expansion control valve is color coded and used in conjunction with a matching color coded PTR pressure temperature relief valve of a higher pressure setting in a hot water system. Therefore, the ECV valve is designed to open first before the PTR valve does. Because the ECV expansion control valve is installed to the cold water supply line, this means the cold water is dripped out first, instead of hot water otherwise via the PTR valve. This cold water dripping feature ensures a better safety and promotes energy saving at the same time. The reduced duty cycle on the PTR valve can promote the PTR valve service life span too. 

A functioning ECV expansion control valve is a requirement by law in many Australian states by plumbing authorities for safety. A typical sign for a faulty ECV valve is when there is a large amount of water leakage in a stream, rather than a controlled dripping. The worn out or leaking ECV valve must be replaced immediately. 

An optional ECV valve insulation jacket is available which can reduce the heat loss and improve the hot water services' overall thermal efficiency. 

Engineer's Notes

The small black plastic part opposite the discharge port is called an auxiliary and serves as an emergency fail safe device by blowing itself out in case of a blockage in the discharge drain pipe. However, this auxiliary can become a failure point itself over time by unintended leakage or blow out due to manufacturing defects. The auxiliary is a threaded part and can be easily screwed in/out. The auxiliary can be replaced cheaply, instead of buying the whole valve.

Although a faulty ECV valve itself is the most common cause for excessive leakages, this can also be caused by a faulty or insufficient pressure limiting valve, which regulates the inlet cold water supply pressure from the street mains into the tank. If the pressure limiting valve is faulty and allows excessive pressure into the water system, the ECV can leak when not faulty. In some extreme cases, the local mains street pressure may be so high to a point that the pressure limiting valve can become insufficient to limit the pressure to a typical 500kPa even with no faults. In these scenarios, a pressure limiting valve may need to be replaced or a pressure limiting valve must be used instead to limit the inlet water pressure sufficiently. 

The plumbing codes require the ECV and PTR discharge pipes connected to a nearby drain or roof down pipes, so the discharging water is not directly dripping to the ground. In cases of no or difficult access to an actual drain, a fake drain may be allowed by the plumbing rules by digging a hole on the ground and make up a fake drain using a PVC pipe section.                                   


Technical Details

  • Brand: APO
  • Model: ECV15/700
  • Watermark License Number: WMK26608
  • Pressure Rating: 700 kPa
  • Color Code: Blue
  • Matching PTR Valve: 850kPa Blue PTR
  • Optional Insulation Jackets Available
  • 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)
  • Expansion Rating: 20 kW 
  • Replaceable Auxiliary 
  • Dry Spring Internal Mechanism with High Temperature Boots and Seals
  • Material: Lead Free DR Brass Valve Body and Stainless Steel Levers
  • Intended Use: Electric tanks, solar tanks, gas storage tanks and heat pumps
  • SKU: APO-ECV15/700 and APO-ECV15/700-I

Package Contents

  • APO ECV15/700 15mm (1/2") 700kPa ECV Expansion Control Valve
  • Package Weight: 300g (350g with the insulation jacket)

 

Shipping Notes
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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: 74226330762

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It’s me
San Leandro, US
★★★★★ 5
Tough Chew Toy
Great chew toy! She loves it more peanut butter spread in it.
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Reviewed in the United States on January 23, 2026
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Julian moon
Louisville, US
★★★★★ 5
Mason’s Big Chew!!!
I bought this item 4 my son’s dog Mason! Mason is a huge chewer! Mason likes 2 b Challenged So this chew toy helped him with that
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Reviewed in the United States on December 9, 2025
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Mary Humphries
Omaha, US
★★★★★ 5
My dogs love these!
My dogs went crazy for these. Will reorder for sure.
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Reviewed in the United States on December 19, 2025
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Abbie Rafael
Carnegie, US
★★★★★ 4
nice quality, great size
This is a nice quality. It is a very good size for large dogs. I have a German Shepherd and it's a very good size for her. She took it when I first attempted to give it to her and she chewed on it for a minute, but then didn't want anything to do with it. If I put peanut butter on it and freeze it she does go for it, just licking the peanut butter off of it and then loses interest again. She has no interest in chewing it. I view it more as a lick mat that she can carry around than anything else, which can get messy if not supervised. Maybe other dogs would be more interested in this. I took one star away because as a standalone chew my dog has zero interest in it. I do really like the quality of it and I do feel like it would last a while for chewers. I do think for dogs interested in it this is a good chew, but it just depends if the dog will be attracted to it. I don't always want to give it to her with peanut butter on it since that can get messy. A good value though.
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Reviewed in the United States on March 9, 2025
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A. Brockman
Fort Morgan, US
★★★★★ 5
Fun in a Great Toy & Fantastic Bargain!
Style: Mummy with Organs
LOVE THIS DOG TOY!! We have 5 rescue dogs, a 13# little one, & 4 lg ones from 70-100 lbs! This toy is fantastic for all of them! It’s so much fun pulling out the various inner “organs” & handing them out (when we first got it)! The dogs were So Excited getting the different parts & squeaking them like Crazy! The main big mummy (10”+) squeaks & crinkles, which goes over really well, too! The nice thing is the center of the mummy, where all the parts are held, is opened/closed via a sturdy zipper! Unlike other items with “stuffed parts” that have Velcro strips to hold the items inside, that ends up all wet & destroyed by chewing, the zipper allows me to open it & close it. This allows my smarter dogs more of a challenge as they can’t just easily open it & get the items inside pulled out a few routine times & then get bored & just destroy them & the Velcro! It also allows me to keep some of the smaller items that I like to keep intact for my small 13# dog, inside the mummy body where they’re protected from my Pit Bull mixes who chew the small toys like gum (I supervise, of course!) destroying the squeakers inside after a few good chomps! This toy is very well made! Despite being aggressively played with by very lg dogs with very strong jaws, every toy (except the set of lungs which have small sections holding them together) has held together, which is a big surprise! Most toys last minutes in this house! The mummy has held up well, with the zipper closed, too! This is such a great bargain for All the toys you get in this set & even You will have fun pulling out the insides & going back to your old High School Biology class to figure out what organ is which! My husband & I had a blast along with our 5 pups playing with this fun set of well made toys! We’re buying another set to have for back up once this set bites the dust! Yeah, it’s That Great!! If you have a small dog, or even a couple, there are so many smaller toys that you can keep some of them aside & introduce them later! A really Great Bargain & Lots of Fun!
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Reviewed in the United States on August 10, 2025

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