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300 Series | Wall Hydrant

The 300 Series Wall Hydrant was added to PRIER's offering with our 2007 purchase of Mansfield’s Brass Division.

The 300 Series was Mansfield’s original design, now manufactured by PRIER in our Kansas City area plant. The 300 Series provides year-round water to areas of structures that are prone to freezing. The hydrant valve is connected to the supply piping in the heated portion of the structure, eliminating the possibility of freezing.

The Mansfield 300 Series is available in sizes from 4” to 14”, in 2” increments.

Identify your Mansfield Style hydrant here. 

Additional Info

PRIER's 300 Series wall hydrant is the original "Mansfield 378" hydrant originally manufactured by Mansfield Plumbing Products in Perrysville, Ohio. The valve is now made by PRIER in our Grandview Missouri plant. It is a simple operating product and is fairly simple to repair.

Possible Repair Issues for the 300 Series Freezeless Wall Hydrant:

300 support

1. When the water is running, water leaks out from behind the handle [VIDEO]

This is a common maintenance occurrence for any packed valve of any brand or manufacture. It is overcome by simply tightening the plastic packing nut. The packing nut is a left hand or reverse threaded nut (older style hydrants may have a right hand threaded nut).This will force the packing tighter around the stem to eliminate leakage. Occasionally, the packing will need to be replaced if the packing nut has been repeatedly tightened.

The parts required for this are included in the service kit part number 630-7755.

630-7755-all parts

 

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2. The hydrant drips after shut off [VIDEO]

Since a freezeless hydrant actually shuts off inside the heated portion of the structure, the water inside the hydrant will drain out after shutoff. The shutoff point could be any distance from 4" to 14" inside the structure. This installation should also be pitched to allow the water to easily drain out of the hydrant. The hydrant may drip for up to 60 seconds after shutoff. If the water continues to drip after that time, you most likely need to replace the seat washer. This is a "OO Beveled Seat Washer” and is included in the service kit part number 630-7755.

630-7755-all parts

 

 

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3. Water is leaking from the hydrant inside my house

Unfortunately, your freezeless hydrant is broken, most likely beyond repair. This happens when the water becomes trapped within the hydrant. The water freezes, expands and ruptures the copper shaft of the hydrant located on the inside the structure. The most common reason for this problem is leaving the garden hose attached during freezing weather, or the hydrant was not installed with the proper drainage pitch.

DO NOT OPERATE THE HYDRANT IF THIS HAS OCCURRED.

Please remove the handle to prevent accidental operation until the problem is repaired by your plumber.

 

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4. The handle is missing from my hydrant

For any one of numerous reasons, your handle may be missing. PRIER's Mansfield Style handle is unique to the Mansfield Style products. This style handle mates perfectly with our stem-end for a snug fit and years of reliable operation.

The required kit is part number 630-7965.

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5. The stem end is damaged and I cannot operate the freezeless hydrant

Occasionally, the stem of the 300 Series Hydrant becomes damaged beyond repair. This is most commonly caused by the hydrant being operated by pliers and damage to the brass on the end.

To determine the proper replacement stem, you need to determine the following:

1. Length of the stem, from brass tip to brass tip.

2. Using the acquired dimensions, determine which stem is required from the chart below:

 

The following stems are for the 300 Diamond Series Mansfield Style Hydrant (manufactured after Spring 2013):

Part # Description
231-3104 Stem for 4" 300 Diamond Series ~ 6 7/16" Overall Length
231-3106 Stem for 6" 300 Diamond Series ~ 8 7/16" Overall Length
231-3108 Stem for 8" 300 Diamond Series ~ 10 7/16" Overall Length
231-3110 Stem for 10" 300 Diamond Series ~ 12 7/16" Overall Length
231-3112 Stem for 12" 300 Diamond Series ~ 14 7/16" Overall Length
231-3114 Stem for 14" 300 Diamond Series ~ 16 7/16" Overall Length

 

The following stems are for the 300 Series Mansfield Style Hydrant pre-Diamond Series (manufactured before Spring 2013):

Part # Description
123-5031 Stem for 4" 300 Series ~ 7 7/8" Overall Length
123-5032 Stem for 6" 300 Series ~ 9 7/8" Overall Length
123-5033 Stem for 8" 300 Series ~ 11 7/8" Overall Length
123-5034 Stem for 10" 300 Series ~ 13 7/8" Overall Length
123-5035 Stem for 12" 300 Series ~ 15 7/8" Overall Length
123-5036 Stem for 14" 300 Series ~ 17 7/8" Overall Length
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6. I need a complete rebuild kit

The 300 Series Mansfield Style wall hydrant has the following repair kits:

Service kit part number 630-7755

630-7755-all parts

Replacement handle kit part number 630-7965

 

Replacement stems

Using the acquired dimensions, determine which stem is required from the chart below:

The following stems are for the 300 Diamond Series Mansfield Style Hydrant (manufactured after Spring 2013):

Part # Description
231-3104 Stem for 4" 300 Diamond Series ~ 6 7/16" Overall Length
231-3106 Stem for 6" 300 Diamond Series ~ 8 7/16" Overall Length
231-3108 Stem for 8" 300 Diamond Series ~ 10 7/16" Overall Length
231-3110 Stem for 10" 300 Diamond Series ~ 12 7/16" Overall Length
231-3112 Stem for 12" 300 Diamond Series ~ 14 7/16" Overall Length
231-3114 Stem for 14" 300 Diamond Series ~ 16 7/16" Overall Length

The following stems are for the 300 Series Mansfield Style Hydrant pre-Diamond Series (manufactured before Spring 2013):

Part # Description
123-5031 Stem for 4" 300 Series ~ 7 7/8" Overall Length
123-5032 Stem for 6" 300 Series ~ 9 7/8" Overall Length
123-5033 Stem for 8" 300 Series ~ 11 7/8" Overall Length
123-5034 Stem for 10" 300 Series ~ 13 7/8" Overall Length
123-5035 Stem for 12" 300 Series ~ 15 7/8" Overall Length
123-5036 Stem for 14" 300 Series ~ 17 7/8" Overall Length
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7. How do I assemble the parts on my stem?

All wearable parts on the stem are available in the service kit part number 630-7755.

300 Series Stem and Packing

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