Viega 50303 1/2-Inch PureFlow Zero Lead Poly Alloy PEX Crimp Manabloc With 30 Ports - 12 Hot 18 Cold

I've serviced or installed just about any plumbing fixture or component available in the market today from lift stations and macerating toilets to steam showers and tankless water heaters. And I've used most any modern material yet serviced many "old school" stuff too like cast iron drain. As far as a potable water supply is concerned, this product is on the right track. The only complaint I would have is that they should integrate fittings that are more industry standard to make the system more compatible with existing systems and/ or materials. Not only should the mains include the adapters but they should fit an existing standard threaded plumbing component. Otherwise it does what it says.

This is replacing a 28 year old manabloc from the Vanguard which I think Viega bought the company. I didn’t think I could install before I had 3 pro plumbers say they had no idea what that thing was, and couldn’t help. So I took a chance and tackled the job my self and it was very easy to install and It’s working great. No leaks as of yet like the old damaged one. I had compression fitting already in good condition only had to replace one with a crimp/clamp, easy fix. Plus I think I saved $$$$ on labor. It also has replaceable valves if needed in future which is great. To bad my old one didn’t have replaceable parts. This unit was for 1/2 pex outlet pipes with 3/4 fitting to the bloc which was all included! and it has 1” inlets/ outlet top and bottom but these are specific to this brand and are hard to find.

If your redoing your plumbing this is your product!

Overall. Product as described. Let's hope this one lasts 20 years like the last one. I reccomend checking every 6 months if you have hard water

I have had this installed for a year now. I had zero issues and it is very well made. My only complaint is you have to use special fittings to connect the manifold. However, they are provided so not a major issue. Also, it will take running the water through the PEX and Manfiold for a few hours to get rid of the plastic taste.

It appears to be working great! We are in the process of changing over are plumbing to this and plumber really likes the system so far. I'll update review when done but so far so good and easy to understand how-to-install and operate.

Wish it was metal. Otherwise does what it should. High price for what it is

I did not recieve installation instructions that stated that you could not use standard thread attachments for this. I tried using a Sharkbite fitting and it stripped the plastic threads. The correct fittings should come with the product if that is what you have to use.