You may also like
3 BLK MI CAP
Manufacturer Resources
Product Specs
- Dimensions Specification:
- ASME B16.3
- End Conn Size 1:
- FPT
- Material Specification:
- ASTM A-197
- Pressure Rating Specification:
- ASME B16.3
- Size 1:
- 3
- Size 2:
- 0
- Strength:
- STD
- Thread Specification:
- ASME B1.20.1
- Ul Fm:
- Yes
- Department:
- Plumbing
- Product Group:
- Plumbing Fittings
- Product Subgroup:
- Caps
- Product Type:
- Cap
- Product Finish:
- Black
- Product Material:
- Malleable Iron
- Product Weight:
- 2.62 lbs
ASC Engineered Solutions 318900842 – Frequently Asked Questions
1) Will a 3 inch black malleable iron cap thread onto standard 3 inch black steel pipe?
Yes. The ASC Engineered Solutions 3 inch black cap has a female pipe thread (FPT) end cut to ASME B1.20.1, which is the standard NPT taper thread used on black steel and malleable iron pipe. Thread it onto any 3 inch male pipe end or nipple of the same thread standard with pipe dope or PTFE tape.
2) Is this 3 inch malleable iron cap approved for fire sprinkler piping?
It carries UL/FM approval, so it can be used on fire protection piping where a listed fitting is required. It is a standard weight (STD) malleable iron fitting rated to ASME B16.3, black finish, which is the usual choice for dry wet-pipe sprinkler mains rather than galvanized.
3) Can I use this cap instead of a plug to close off a 3 inch pipe?
A cap threads over the outside of a male pipe end, so use it when the run terminates in a nipple or a threaded pipe end. This one is female threaded (FPT). A plug is the opposite, it threads into a female opening such as a tee branch or a coupling. Pick based on which gender the open end is, not on pressure, since both are rated the same way in Class 150 malleable.
4) What is the pressure class on this 3 inch malleable iron pipe cap?
It is a standard weight malleable iron fitting, pressure rated per ASME B16.3. Standard weight in ASME B16.3 is Class 150. The casting is ASTM A-197 malleable iron and the dimensions follow ASME B16.3 as well, so it will match the take-out of any other Class 150 black malleable cap of the same size.
5) Black or galvanized cap: which one do I want for my 3 inch line?
This one is black malleable iron. Black is the right call on closed systems that stay dry or full of non-potable water, steam, gas, and fire sprinkler mains. If the line is exposed to weather, is a wet outdoor service, or your spec calls for corrosion protection, order the galvanized version of the same cap instead. The threads and ASME B16.3 dimensions are the same either way, so it is purely a coating decision.
6) What model number do I order for the ASC 3 inch black malleable cap?
The manufacturer part number is 318900842, from ASC Engineered Solutions. It is a single 3 inch black malleable iron cap, standard weight.
7) How much does the 3 inch ASC black malleable cap weigh?
2.62 lbs each. Worth knowing if you are capping several branch ends overhead on unistrut or hanger-supported pipe, or figuring freight on a case quantity.
How fast can I get the ASC Engineered Solutions 318900842 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the ASC Engineered Solutions 318900842 come with a warranty?
Absolutely. The ASC Engineered Solutions 318900842 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the ASC Engineered Solutions 318900842?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the ASC Engineered Solutions 318900842 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.