---
product_id: 489078138
title: "MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet)"
brand: "mrbrew"
price: "€ 42.65"
currency: EUR
in_stock: true
reviews_count: 5
category: "M Rbrew"
url: https://www.desertcart.hr/products/489078138-mrbrew-mmp-517-18-10-steel-ball-lock-keg-posts
store_origin: HR
region: Croatia
---

# Universal Standard Fit 18/10 Stainless Steel Durability Leak-Proof O-Ring Seal MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet)

**Brand:** mrbrew
**Price:** € 42.65
**Availability:** ✅ In Stock

## Summary

> 🍺 Lock in freshness, unlock your brew’s full potential!

## Quick Answers

- **What is this?** MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet) by mrbrew
- **How much does it cost?** € 42.65 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/489078138-mrbrew-mmp-517-18-10-steel-ball-lock-keg-posts)

## Best For

- mrbrew enthusiasts

## Why This Product

- Trusted mrbrew brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Fits Like a Glove:** Universal sizing means hassle-free compatibility with most ball lock kegs, making upgrades and replacements seamless.
- • **Zero-Leak Confidence:** Precision-engineered O-rings create a rock-solid seal on both gas and liquid connections—no more wasted beer or gas.
- • **Customer-First Support:** Backed by responsive service ready to solve any issues—because your perfect pour matters.
- • **Effortless Installation:** Designed for quick threading and smooth connection, so you spend less time fiddling and more time pouring.
- • **Built to Last with 18/10 Steel:** Premium corrosion-resistant stainless steel ensures your keg posts stay flawless brew after brew.

## Overview

The MRbrew MMP-517 ball lock keg posts are crafted from durable 18/10 stainless steel and feature high-quality O-rings to prevent leaks on both gas and liquid connections. Designed with universal standard sizing, these posts fit most ball lock kegs, ensuring easy installation and reliable performance. Ideal for homebrewers seeking a durable, leak-proof upgrade, MRbrew also offers attentive customer support to guarantee satisfaction.

## Description

Please Note： Before order you need know which kind of the keg you have. Firestone and Spartanburg Keg use 9/16""-18 thread Cornelius Type Keg use 19/32""-18 thread. MRbrew concentrate on producing and selling high quality home brew products, you can get more surprise products in our store. Good products will bring you perfect experence for home brewing . If you have any question and suggestion please contact us

Review: Great customer service! - *Update* I originally gave these a 1 star review for the reasons below. The seller quickly reached out and even though I had already returned these to desertcart for a prompt refund, he sent me a complementary new set. They were sent out very quickly through desertcart. He did not ask me to change my review, but I did. Original problems aside, the replacement set works well. They thread onto the keg smoothly and seal. The gas-in post now fits snugly with my gray quick connect and does not leak when I move it. -------------- These looked nice, but that's about it. The gas out was tough to seal to the keg. I had to use a brand new tube oring (as I should), but before changing the oring, I tried another spare post with the old oring and that sealed fine. This did seal with the new oring, but it was worrisome that it leaked so badly with a good condition used oring. I moved on to test the gas in. That leaked big time on the seal with the quick connect. I changed the post oring. The leak got better, but still leaked with any movement. I did notice that the supplied orings are soft material, my spares are standard hardness. But I think the real problem is the depth of the oring groove. I didn't write down the measurements, but the groove is slightly deeper in these than my other gas posts preventing the oring from sealing tightly. This was also apparent in how easy the gas quick connect was to spin. Lots of up and down play and pretty much zero resistance to rotate the quick connect. It felt like there was no oring in there, not a tight fit at all. The flow through these posts was also very low. The gas was barely hissing through. Not recommended, too much time wasted testing them.
Review: Very happy with these keg posts - I bought these keg posts to replace the ones on my Cornelius kegs. The old posts were starting to leak, so I thought I would give these a try. The posts arrived quickly and were well-packaged. They looked like a good quality post, so I installed them right away. I was very happy to find that the posts fit perfectly and did not leak. I have been using them for a few months now and they have been working great. I am very happy with these keg posts. They are a great value for the price and I would definitely recommend them to anyone looking for a replacement keg post. Here are some of the pros and cons of the MRbrew Cornelius Type Ball Lock Keg Posts: Pros: Affordable Easy to install Durable No leaks Cons: None

## Features

- NO LEAKSBall lock posts are with quality o-ring to prevent leaks on gas and liquid connection end
- UNIVERSAL STANDARD SIZEMRbrew ball lock keg posts make your keg application easier than ever
- ISSUES SOLVING FOR YOUBe assured to let us know if you are not satisfied, we are here for you
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B9Y112HV |
| Brand | MRbrew |
| Colour | Silver |
| Customer Reviews | 4.3 4.3 out of 5 stars (93) |
| Date First Available | 21 Sept. 2022 |
| Item Weight | 95 g |
| Material | Stainless Steel |
| Model Number | MR-2-BLKP |
| Package Dimensions | 15.3 x 8 x 1.8 cm; 95 g |

## Images

![MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet) - Image 1](https://m.media-amazon.com/images/I/61ft-Rim4SL.jpg)
![MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet) - Image 2](https://m.media-amazon.com/images/I/71Y4MOSqSZL.jpg)
![MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet) - Image 3](https://m.media-amazon.com/images/I/61FADcpBx3L.jpg)
![MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet) - Image 4](https://m.media-amazon.com/images/I/713HKZfh0UL.jpg)
![MRbrew MMP-517, 18/10 Steel, Ball Lock Keg Posts(Post & Poppet) - Image 5](https://m.media-amazon.com/images/I/71X8qyUGj2L.jpg)

## Available Options

This product comes in different **Color, Size** options.

## Questions & Answers

**Q: It states that these can be used to convert a Firestone keg to ball and lock, but then states further down that they are not compatible? Clarify plz.**
A: If you want to convert your firestone kegs ( pin lock) to ball lock you can do that.  But if u have pinlock disconnects for your beer and co2 lines they wont be compatible with these poppets.

**Q: I just recieved these and it would seem I got 2 liquid ones. My kegs are marked in and out will not having the gas one effect use?**
A: The ball locks are colored gray (gas in) and black (liquid out). Each fit on their corresponding posts. You can force the gray on the “out” post but most likely get leaks, both air and liquid. They are slightly diff sizes and I would recommend not doing it.

**Q: Can you replace hex 7/8 keg posts on a cornelius co. keg.  the thread is the same, but some people say no. had anone tried, what was the problem?**
A: Thank you for your question.These 2 posts bottom thread size is I.D 1/2'', it can't replace 7/8‘’ posts.

**Q: These are type b keg posts, correct?**
A: Thank you for your question.This is Cornelius Type Ball Lock Keg post.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great customer service!
*by S***K on 24 February 2019*

*Update* I originally gave these a 1 star review for the reasons below. The seller quickly reached out and even though I had already returned these to Amazon for a prompt refund, he sent me a complementary new set. They were sent out very quickly through Amazon. He did not ask me to change my review, but I did. Original problems aside, the replacement set works well. They thread onto the keg smoothly and seal. The gas-in post now fits snugly with my gray quick connect and does not leak when I move it. -------------- These looked nice, but that's about it. The gas out was tough to seal to the keg. I had to use a brand new tube oring (as I should), but before changing the oring, I tried another spare post with the old oring and that sealed fine. This did seal with the new oring, but it was worrisome that it leaked so badly with a good condition used oring. I moved on to test the gas in. That leaked big time on the seal with the quick connect. I changed the post oring. The leak got better, but still leaked with any movement. I did notice that the supplied orings are soft material, my spares are standard hardness. But I think the real problem is the depth of the oring groove. I didn't write down the measurements, but the groove is slightly deeper in these than my other gas posts preventing the oring from sealing tightly. This was also apparent in how easy the gas quick connect was to spin. Lots of up and down play and pretty much zero resistance to rotate the quick connect. It felt like there was no oring in there, not a tight fit at all. The flow through these posts was also very low. The gas was barely hissing through. Not recommended, too much time wasted testing them.

### ⭐⭐⭐⭐⭐ Very happy with these keg posts
*by N***P on 7 June 2023*

I bought these keg posts to replace the ones on my Cornelius kegs. The old posts were starting to leak, so I thought I would give these a try. The posts arrived quickly and were well-packaged. They looked like a good quality post, so I installed them right away. I was very happy to find that the posts fit perfectly and did not leak. I have been using them for a few months now and they have been working great. I am very happy with these keg posts. They are a great value for the price and I would definitely recommend them to anyone looking for a replacement keg post. Here are some of the pros and cons of the MRbrew Cornelius Type Ball Lock Keg Posts: Pros: Affordable Easy to install Durable No leaks Cons: None

### ⭐⭐⭐⭐⭐ Great to have extras
*by R***Y on 17 July 2026*

If you work with ball-lock kegs, these are nice to keep around as extra replacement valves.

## Frequently Bought Together

- MRbrew 2 Pair Ball Lock Keg Post, Stainless 304 Homebrew 19/32’’-18 Co2 Gas kegerator Beer Liquid Cornelius Corny Poppet Spring Spare Sealing O-ring Keg Posts Kit for Brewing Quick Disconnect Fitting
- MRbrew Homebrew Gasket Set, 20 Pieces Corny Kegging Sealing O-Ring Replacement Beer Soda Washer Kit for Cornelius Keg Lid Ball Lock Keg Post Dip Tube with O-Ring Removal Tool
- Semfeil Brew 304 stainless steel Cornelius Keg Lid New Replacement Corny Keg (Soda Keg) Lid with New O-ring for Cornelius or Firestone Kegs for homebrew beer kegging…

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*Product available on Desertcart Croatia*
*Store origin: HR*
*Last updated: 2026-08-21*