Domestic Plumbing Valves

Lead Free Valves for Potable Water Applications

Potable Water Solutions

Griswold Controls has a full product line certified to NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 – 2020 standards for use in potable water applications like Domestic Water Recirculation in Condos, Dormitories, and Hotels.

Visit our certifications page for details on all the valves.

Click Here: Certifications Page

K Valve	Pure Flow+
Unimizer®	Streamline

Domestic Plumbing Valve Specification Sheets

K Valve

K valves are available with a wide range of flows and PSID ranges, and are the perfect choice for tight spaces. These valves offer easily accessible flow control cartridges, accessible without breaking piping connections, so exchange of the cartridge for flow changes can be made as required

Accessible Cartridge Specifications PSI / Temperature Rating: 1/2″-1-1/2”: 600 WOG 400 PSI / 250ºF 1-1/2″L-3″: 400 WOG 275 PSI / 250 ºF Cartridge: AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring Body Material: Forged brass (Certified No Lead1 DZR Brass Available) (1/2″ to 1-1/2″) Cast brass (1-1/2″L to 3″) End Connections: Female NPT (Sweat Available on 1/2″ to 3/4″ Housing) Seals: EPDM O-Rings Body Tappings2: Two P/T Test Valve (CPTA) Optional Strainer3: 20 mesh stainless steel

¹ No Lead brass contains less than 0.25% lead content by weight on wetted surfaces. 3rd party certification for CA AB1953 and NSF-61 Annex G was performed by Truesdail Labs. Certificate available on website. Certification label is applied to valve surface.

² Body Tappings for accessories are a leak proof metal to metal seal and do not require pipe dope or tape. Tape or dope should not be used.

³ The optional strainer is internal and does not affect the dimensions. Strainer is available only on 1/2″L to 1-1/2″ models.

K Valve Specification Sheets

PureFlow+

The PureFlow+ features a removable tailpiece for hassle-free installation and maintenance of the valve.

Stainless Steel Body Specifications PSI / Temperature Rating: 450 PSI / 250º F Cartridge: AISI Type 304 stainless steel AISI Type 17-7 PH stainless steel spring Body Material: 304 Stainless Steel (Certified Lead Free1) Cartridge Seal: EPDM O-Ring End Connections: Female NPT Union Seal: EPDM O-Ring Assembly: Valve comes fully assembled

¹ Valve contains less than 0.25% lead content by weight on wetted surfaces. 3rd party certification for CA AB1953 and NSF-61 Annex G was performed by Truesdail Labs. Certificate available on website. Certification label is applied to valve surface.

PureFlow+ Specification Sheets

Unimizer^®: 2-Way

Griswold Controls’ “universal solution” Unimizer® features multi-actuator compatibility because the same actuator is not the right choice for every job. The parabolic flow inserts insert in the Unimizer^® uses Noryl material, providing broad thermal capability, corrosion resistance, and low coefficient of friction and water absorption. Griswold Controls’ Optimizer® parabolic flow inserts is press-fit into the ball, causing less wear and higher close-off pressure, unlike traditional discs.

Actuated Valve Specifications Static Pressure/Temp: 360 PSI / -4º F to 250º F (600 WOG) Service: Chilled water, hot water, up to 50% Glycol, or contact factory for additional fluids. Flow Optimizer: Glass Filled Polymer Body Material: Forged Brass ASTM B283-06 (Lead Free1 Brass Available) End Connections: Brass – NPT or BSP Field Repairable Stem: Dual Teflon seals and EPDM O-rin Stem Seals: EPDM O-Rings Ball Valve: Nickel-plated brass ball Optional: Stainless Steel ball Ball Seals: Teflon Seals with EPDM O-Rings Angle of Rotation: 0–90 Leakage Rate: ANSI Class IV, .01% of Cv

¹ Contains less than 0.25% lead content on wetted surfaces, is certified to meet current legislation, and is compliant with NSF-61G standards.

Unimizer®: 2-Way Specification Sheets

Streamline

Griswold Controls Streamline Valves are the most compact actuated valve on the market with the actuator motor built directly into the valve housing. The Streamline Control valve incorporates the original automatic flow limiting cartridge to maintain constant flow even when system pressures change. The Streamline Zone valve is for actuated control only. The ceramic disc in the Streamline Control and Streamline Zone valves provides bubble tight close off against highrise-level system pressures, the highest close off pressure in the industry!

Most Compact Actuated Valve on the Market Specifications PSI/Temperature Rating: 400 PSI / 200º F Service: Chilled water, hot water, or water up to 50% Glycol Flow Element: 2-Way Ceramic Disc Cartridge: AISI Type 304 Stainless Steel AISI Type 17-7 PH Stainless Steel Spring Body Material: Forged Brass (No Lead1 Brass Available) End Connections: Brass FNPT or SWT Close Off ΔP: 250 PSI – ANSI Class 4 Cv: Electrically adjustable Actuator Voltage: 22-35 Vac/Vdc Actuator Cycle Time: 52 seconds

¹ No Lead brass contains less than 0.25% lead content by weight on wetted surfaces. 3rd party certification for CA AB1953 and NSF-61 Annex G was performed by ALS Labs. Certificate available on website. Certification label is applied to valve surface.

Streamline Specification Sheets

Griswold Controls Solves Cold Shower Issues

Cold showers and lack of hot water are a building manager’s nightmares! Unbalanced systems also happen in domestic hot water recirc. and lead to loud complaints from tenants.

Since 1960 Griswold Controls has made automatic flow limiting (automatic balancing valves) for the HVAC industry. An automatic flow limiting valve maintains a constant flow in spite of pressure changes in the system, so the equipment in each zone has the flow it needs at all times. In comparison, when a system is unbalanced you have some equipment in the building that has excessive flows due to high-pressure differentials and some equipment that has inadequate flows due to lower pressure differentials. High flows can lead to excessive heating/cooling, high-velocity noise and erosion, wasted pump energy, and dehumidification problems. Low flows can lead to inadequate heating/cooling and short-circuiting of equipment. Typically an unbalanced system has the higher flows near the pumps and the lower flows are in the index circuit, the equipment farthest from the pump.

The same flow issues that exist in an unbalanced HVAC system also exist in an unbalanced domestic hot water recirc. system but now you have the added issue of users having inadequate hot water for their shower, faucet, or washer and that can lead to much more angry complaints! So balancing a domestic hot water recirc. system is as important as balancing an HVAC system. Often these systems are balanced with ball valves or manual balance valves, both requiring balancing labor and in the end, neither maintain balance when the system has pressure changes. Unlike HVAC systems, these are open systems and as people open and close faucets and run washers it causes even more pressure changes than an HVAC system experiences which can cause even more flow changes. Another factor with an open system is water will take the path of least resistance so if a faucet is open close to the pump in an unbalanced system the faucet farthest from the pump will have less hot water available to it.

The same flow-limiting cartridges used in our HVAC valves can be used in a lead-free valve housing to control the flow in domestic hot water systems. The burden of balancing is shifted from the contractor to the valve itself as it maintains flow, regardless of pressure changes, through the life of the valve. For years Griswold Controls representatives have been selling automatic flow limiting valves in high rise buildings like hotels, condos, and dormitories. Recently a building manager was interviewed about the impact in their system of removing Griswold Controls automatic flow limiting cartridges for cleaning and they said they had complaints about inadequate hot water from the day the parts were removed for cleaning. Once they were replaced the complaints stopped. So adding automatic valves can guarantee the hot water is distributed to each unit and remains balanced regardless of pressure changes in the system. Typical domestic hot water recirc systems use flow limiting valves set at 0.55 GPM since .55 GPM is adequate for a faucet or shower but the flow can be different for larger zones. And since the valve is pre-set for the flow no human balancing is required. This is less flow than is typically specified for a manual system since they have to pump more flow to make sure that there is enough hot water at every location when the system is unbalanced due to pressure changes. Designing for less flow means smaller pumps that save on initial installation costs.

Because the laws have changed over the years we offer the certified lead-free K Valve and Pure Flow+ for these domestic water applications to meet the government’s requirements. We also offer the lead-free Unimizer and Streamline for actuated valve applications like hot water heaters.

All our lead-free valves are certified to NSF 61G standards.