300 Series | Wall Hydrant
PRIER 300 Series provides a year round source of water in areas that are subject to freezing temperatures. The hydrant valve is connected to the supply piping in the heated portion of the structure, eliminating the possibility of freezing.
The PRIER 300 Series is one of the original freezeless hydrant designs and is installed throughout the United States. It is available from stock in lengths 4” to 14”.
Identify your Mansfield Style hydrant here.
The Mansfield line also has a 408 Series with a half-turn and internal vacuum breaker as well as the 400 Series with a half-turn, vacuum breaker, and 11 inlet options.
Features
- Integral cast flange with built-in drainage pitch
- Wide screw holes easily secure mounting screws
- Solid brass body and seat
- Satin nickel plated body maintains attractive finish
- Stainless steel screws
- Easy grip polycarbonate operating handle
- AFG teflon with graphite packing for easy maintenance
- Standard “OO” size seat washer
- Each valve air-tested at factory for leak-free quality
- Spout aligning mark with manufacturer’s date code
Product Support
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 include:
1. When the water is running, water leaks out from behind the handle
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.
2. The hydrant drips after shut off
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.
3. Water is leaking from the hydrant inside my house
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.
4. The handle is missing from my hydrant
The required kit is part number 630-7965.
5. The stem end is damaged and I cannot operate the freezeless hydrant
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):
The following stems are for the 300 Series Mansfield Style Hydrant pre-Diamond Series (manufactured before Spring 2013):
6. I need a complete rebuild kit
Service kit part number 630-7755
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):
The following stems are for the 300 Series Mansfield Style Hydrant pre-Diamond Series (manufactured before Spring 2013):
7. How do I assemble the parts on my stem?
