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Valve Stem Replacement Kit - Full Turn
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50602 has been discontinued
Discontinued July 12, 2025
This product was discontinued by the manufacturer.

Product Highlights

Product Highlight: Material
Plastic
Product Highlight: Max Pressure (PSI)
200 MAX PSI
Product Highlight: Warranty
5 Year Warranty
Product Highlight: Standards Met
ASTM F877, ASTM F1960, NSF Standards Met
Product Highlight: Max Temp (F)
200°F Max Temp

Description

Valve Stem replacement kit allows for easy replacement of Manabloc or Minibloc valves. This kit includes on red valve, one blue valve, one valve removal tool, and one T-Handle valve key.

Specs

Material:

Plastic

Application:

Plumbing

Max Pressure (PSI):

200

Warranty:

5 Year

Standards Met:

ASTM F877

ASTM F1960

NSF

Max Temp (F):

200°F

Manifold Compatibility:

MINIBLOC

Manabloc

Type:

Valve Part

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Valve Stem Replacement Kit - 1/4 Turn
SKU: 51602
Viega

Product Reviews

4.52 out of 65 reviews
92% would recommend this product
4.52
out of 65 Reviews
92% would recommend this product
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5 star
80%
4 star
9%
3 star
2%
2 star
2%
1 star
8%
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Customer Images

Most Liked Positive Review

Newer generation of valves with a much beefier diamond plug!

You need at least 6-8 inches of clear access to properly replace old, damaged Manabloc Valves as "demonstrated" in the Supply House video. The tool supplied partially unseats the old valve, so a could pair of pliers comes in handy to completely remove it. Slipping on the new valve is easy and seats solidly in place. The diamond plug on the face of the new valve is about 3X larger then those on older plugs. A huge improvement!
VS

Most Liked Negative Review

Good Service But

Pex Supply processes and ships fast. The valve stem replacement kit does not work/fit my vanguard manifold which is about a 2005 model. My only option is to take advantage of Vanguards 10 year warranty and swap the entire manifold out. My recommendation is to stay away from any plastic manifolds. Not heavy duty enough and valve stem replacements are not going to work. Tried in several of my ports and the new stems always leaked (even on ports that were not leaking).
Showing 1-10 of 65 reviews

Perfect fit

Happy that this was available was difficult to find. Recommended by factory and received the part number to order correct part the first time
Badger
St. George UT
1 years ago
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I intend to buy this iten again.

Fit perfect. The tool was a waste.
Bud
Texas
1 years ago
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They Worked

These parts worked just as they were suppose to.
tommy61944
Indiana
2 years ago
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I would Highly Recommend this Product…

Simple and Easy to install…
Jesse
Las Vegas
2 years ago
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Worked exactly as specified

Valve stems and tool worked perfectly. I was a bit concerned as my Manabloc is 20 years old bit no issues at all. Also found the videos on Youtube helpful, thanks.
GorillaPlumber
Vegas Baby
2 years ago
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Fast & easy

Easy ordering and quick delivery. Will use again if I need plumbing supplies
Gc
Las vegas
2 years ago
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Great products

Just what we needed to repair leaks in some valves of a home I just purchased that has this plumbing system. We went ahead and replaced them all.
Susie
FL
2 years ago
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Perfect kit

Perfect kit and fits well to the leaky old valve, make sure to know the parts number in order to replace the old one.
Man
Texas
2 years ago
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I would buy this product time and time again

Worked like a charm!
Plumbing Company
Brenham, TX
2 years ago
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Parts were exactly what I needed

Just what I needed to replace the valve stem in my older model Viega Manabloc system. Was very happy with the speed of order filling and shipping from Supply House.
Paulster
The great Red State of Tennessee
3 years ago
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Product Q&A

4 Questions
4 Questions
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Q: My manabloc was installed in 1998 and it is also the vanguard manabloc do you think the valve stem replacement part would be compatible?

Asked by 14 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

Probably not. Viega acquired the MANABLOC line from Vanguard in 2004. Current replacement parts generally only work with units manufactured after that time.

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- Anonymous

Most likely not. Current replacement parts only work with models manufactured after 2004.

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- Brett

I replaced all the valves in the manabloc with these(the old valves were black in color)(both hot and cold) and they fit. The house was built in 2001.

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- Billy Bob

Yes, I replaced all of the old style valves (black stemmed by Vanguard) that were installed in Jun/98 with the new style (red and blue by Viega)in Mar/12. Very easy installation. Just follow the directions. I would recommend buying the Manabloc compression nut wrench to remove every other water line to make it easier to get behind the manifold to "pop" out the old ones otherwise you won't be able to do it yourself. It took me approximately 1 hr and 10 min to change out 38 values. This included turning off the water, drain the Manabloc, remove the red and blue caps covering the black valve stems (pry them with off with the slotted end of the provided tool), take loose every other water line and pull it back so you can get your hand behind the water valves, pop out the old valves (with the same provided tool), push in new valves with your thumb until hear them click into place, attach the water lines back, turn the water back on and check for leaks which I did not experience any.

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Q: Just recieved the replacement kit, but we don't know how to replace the valve! Do you have easy instuctions? Thanks!

Asked by Linda 15 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

Please refer to the instructions below. http://s3.pexsupply.com/manuals/1303835217979/54427_PROD_FILE.pdf

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Q: how do you replace the valve stem thanks

Asked by 15 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

You need to use the included T-Handle wrench to remove the existing valve and secure the new one into place.

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Q: Is the Viega Valve stem replacement Kit compatible with older ?) Vanguard Manabloc valves?

Asked by cjm5035 16 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

It depends on the age of the Vanguard MANABLOC.

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- CJ

Yes, I have an older Vanguard Manabloc system and Viega Values did the trick. They work great!

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- Alaskabushtb

Don't think so. Mine was installed around 2000 so if you find a parts source for "older" MANABLOCK, let us know! Alaskabushtb

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