under the read cap is a black plastic plug, inside the water tank. Is that suppose to be removed?

That thing under the red cap that you call a plug is not a plug. Think about it! The tank is precharged with 25psi which is pushing the bladder so hard against the fitting end of the tank that it pushes the part of bladder covering the hole up into it some so it looks like a plug to you! I assure you that what your referring to is the bladder! Do not mess with anything under that red dust cap because you will ruin the the whole thing if you do.

on the back end of this tank - what is the opening size

As of this date (Feb 2020), the tank has a 1” male NPTM (national pipe thread straight mechanical vs. male NPT which is tapered). Code usually requires male pvc to be connected to female if using brass so, for this tank place a female-female coupling to the tank then continue with pvc to pump/house.

why does the tank runs when there's not water running or leaks?

not understanding, is your pump running when u are not using it? Did you adjust the PSI of the tank with the recommended setting from your pump before using it?

I have 11 water faucets, toilets etc. what size pressure tank should i have with a 1/2 or 3/4 horse shallow well pump?

The 'rule of thumb' is to count all inside and outside faucets/toilets/washers/etc and time the number by three then use a tank with the next larger capacity in gallons. So, in your case, 11water sources x3 = 33 so you would want at least a 35gal tank with 40gal being the 'standard' size. So, answer is you want a 40gal pre-charged tank.

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WaterWorker HT-14HB Water Worker Horizontal Pre-Charged Well Tank, 14 Gal, 1 in Mnpt, 100 Psi, Steel, Blue

Product ID: 16512161

Details

Brand
Water Worker
Capacity
14 gallons
Color
Blue
Item Weight
16 ounces
Specification Met
ANSI/NSF

💧14 Gal capacity

🔵Durable blue steel shell

⚙️100 PSI max pressure

83017 kr

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Description

💧 Elevate your water system with smarter pressure and lasting reliability!

NSF CERTIFIED SAFETY - Meets ANSI/NSF Std 61 for clean, odorless, and taste-free water storage.
ENERGY SMART DRAWDOWN - Maximize pump efficiency with larger drawdown, reducing cycles and extending pump life.
COMPACT DURABLE DESIGN - Steel shell with high gloss enamel finish resists corrosion and fits easily in tight spaces.
PLUG PLAY INSTALLATION - Pre-charged to 25 PSI for hassle-free setup and immediate performance.
SEAMLESS BUTYL DIAPHRAGM - Flexes smoothly to prevent waterlogging and maintain consistent pressure without external air controls.

The WaterWorker HT-14HB is a 14-gallon pre-charged horizontal well tank featuring a seamless butyl diaphragm and a corrosion-resistant steel shell. Certified to NSF standards, it ensures clean water without taste or odor contamination. Designed to optimize pump cycles by maximizing drawdown, it saves energy and extends pump life. Its compact, durable design with a high gloss enamel finish makes it ideal for professional-grade water systems requiring reliable pressure management.

Specifications

ASIN	B000WCBU3M
Best Sellers Rank	#230,593 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #294 in Water Pump Accessories
Brand Name	Water Worker
Capacity	14 gallons
Color	Blue
Customer Reviews	4.3 4.3 out of 5 stars (106)
Global Trade Identification Number	00642031613127
Included Components	Water Worker - HT14HB
Item Type Name	Water Worker - HT14HB
Item Weight	16 ounces
Manufacturer	Waterworker
Manufacturer Part Number	Water Worker - HT14HB
Manufacturer Warranty Description	Warranty.
Model Number	Water Worker - HT14HB
Number of Items	1
Number of Packs	1
Specification Met	ANSI/NSF
UPC	642031384270 642031613127
Unit Count	1 Count

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83017 kr

Duties & taxes included

In stock

Sold byAmazon IcelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Iceland.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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