Is this for the membrane or tank?

I have 3 of these on my RO system. 1 to measure pressure before the membrane, 1 after the membrane and 1 on the tank. They can be used where ever you need to know water pressure. These will have an air bubble visible through the glass, it's normal and relieves pressure in the gauge, so don't be concerned with the air bubble.

Where should this be installed? Input to ro system or output from tank?

TJK... There are varying thoughts on this subject. My research has led me to install the gauge directly after the third stage of my 7 stage "Aquasafe aquarium II". I think as long as you install the gauge after your pre-filters will give you the true reading of the pressure in your unit. The bottom line is how much pressure is going into your RO canister. The RO membrane is the only part of the unit that works more efficiently with pressures above 40 psi. (50-60 psi). I hope this helps. NOTE most manufacturers have tutorials on their web site.

What does this do? Does it tell you if you have a busted bladder in the tank, hence no pressure?

no its to monitor the water presure coming in out of the filters this way you can tell if filters need changing.. as far as the bladder in the tank being busted you really don't need a guage for that if that occurs you would be able to tell because there would be water coming out of the valve that you use to put air in it

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DIGITEN Water Pressure Gauge Meter 0-1.6MPa 0-220psi 1/4" f Reverse Osmosis System Pump

Product ID: 50660724

Details

Brand
DIGITEN
Material
Stainless
Number of items
1
Thread type
NPT
Unit count
1.0 count

📏0-1.6MPa / 0-220PSI pressure range

🔧1/4" quick connect fitting

🛡️2" stainless steel gauge diameter

¥5221

Duties & taxes included

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Stay ahead of water pressure problems with precision and ease!

TRUSTED BY THOUSANDS - 4.4-star rating from 800+ users proves reliability and ease of use.
EFFORTLESS INSTALLATION - 1/4" quick connect fitting ensures fast, tool-free setup.
OPTIMIZE RO PERFORMANCE - Install at membrane inlet to detect pressure issues before they escalate.
DURABLE STAINLESS STEEL BUILD - Robust 2" gauge designed to withstand daily wear and tear.
PRECISION PRESSURE MONITORING - Accurately measures 0-1.6MPa (0-220PSI) to safeguard your RO system.

The DIGITEN Water Pressure Gauge Meter offers precise pressure readings from 0 to 1.6MPa (0-220PSI) with a durable 2-inch stainless steel gauge and a convenient 1/4" quick connect fitting. Ideal for reverse osmosis systems, it helps detect pressure issues early, ensuring optimal performance and longevity of your filtration setup.

Specifications

ASIN	B00VUXD7ZG
Best Sellers Rank	274,034 in DIY & Tools ( See Top 100 in DIY & Tools ) 135 in Plumbing Testing Equipment
Brand	DIGITEN
Country Of Origin	China
Customer Reviews	4.5 4.5 out of 5 stars (833)
Manufacturer	DIGITEN
Manufacturer Part Number	ROCON-24
Material	Stainless Steel
Number of Items	1
Number of Packs	1
Thread Type	NPT
UPC	713458679703
Unit Count	1.0 count

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