Introducció
This manual provides essential information for the proper installation, operation, and maintenance of your Watts LF26A Water Pressure Regulator Valve. Please read this manual thoroughly before installation and keep it for future reference. This valve is designed to reduce incoming water pressure to a safe and functional level for residential and light commercial applications, protecting plumbing systems and fixtures from high pressure damage.
Producte acabatview i Característiques
The Watts LF26A is a high-quality water pressure regulator valve engineered for reliable performance and durability. Key features include:
- Lead-Free Brass Body: Constructed from durable lead-free brass for safe potable water applications.
- Rang de pressió ajustable: Allows for precise adjustment of outlet pressure from 1 to 25 psi.
- FIP Connections: Features 3/8 inch Female Iron Pipe (FIP) connections for easy installation.
- Aprovat per la NSF: Certified to meet NSF standards for water quality and safety.
- Disseny compacte: Efficient design with dimensions of 2.3 x 2.3 x 5.1 inches.
- Pressió màxima alta: Capable of handling maximum inlet pressures up to 300 psi.
- Valoració de la temperatura: Suitable for water temperatures up to 140 degrees F.

Figure 1: Watts LF26A Water Pressure Regulator Valve. This image displays the valve's brass body, the FIP threaded connections on the side, and the pressure adjustment screw located at the top of the brown housing.
Informació de seguretat
Always observe the following safety precautions during installation and maintenance:
- Ensure water supply is shut off and pressure is relieved before beginning any work.
- Utilitzeu equips de protecció individual (EPI) adequats, com ara ulleres i guants de seguretat.
- No supereu la pressió o temperatura màxima de funcionament especificada per a la vàlvula.
- Si no esteu segurs de cap pas, consulteu un lampista qualificat.
- Comply with all local plumbing codes and regulations.
Instal·lació
Llista de verificació prèvia a la instal·lació:
- Verify that the valve model (LF26A) and size (3/8 inch) are correct for your application.
- Ensure you have the necessary tools: pipe wrenches, thread sealant (Teflon tape or pipe dope), and a pressure gauge.
- Inspect the valve for any visible damage before installation.
Passos d'instal·lació:
- Tancament del subministrament d'aigua: Localitza la vàlvula principal de tancament d'aigua de la teva propietat i tanca-la.
- Sistema de drenatge: Obriu una aixeta al punt més baix del sistema per drenar l'aigua i alleujar la pressió.
- Seleccioneu la ubicació: Install the pressure regulator valve in an accessible location, typically after the main shut-off valve and before any branch lines. Ensure there is sufficient space for future maintenance.
- Preparar connexions: Apply appropriate thread sealant (Teflon tape or pipe dope) to the male threads of the pipes connecting to the valve.
- Install Valve: Orient the valve according to the flow arrow cast on its body. The arrow must point in the direction of water flow. Thread the valve onto the pipes, tightening securely with pipe wrenches. Avoid overtightening.
- Install Pressure Gauge (Recommended): For accurate pressure monitoring, install a pressure gauge downstream of the regulator.
- Restaurar el subministrament d'aigua: Obriu lentament la vàlvula principal de tancament d'aigua. Comproveu si hi ha fuites a totes les connexions.
- Aire de purga: Open faucets throughout the system to purge air until water flows smoothly.
Funcionament
The Watts LF26A valve is factory preset to a nominal pressure. Adjustment may be necessary to achieve the desired system pressure.
Ajust de la pressió de sortida:
- Ensure a pressure gauge is installed downstream of the valve for accurate readings.
- A augmentar the outlet pressure, turn the adjustment screw (located on top of the valve) en sentit horari.
- A disminuir the outlet pressure, turn the adjustment screw en sentit antihorari.
- Make small adjustments (e.g., quarter turns) and observe the pressure gauge. Allow the system pressure to stabilize after each adjustment.
- Once the desired pressure is set, ensure the locknut (if present) is tightened to secure the setting.
The adjustable pressure range for this model is 1 to 25 psi.
Manteniment
Regular maintenance helps ensure the longevity and optimal performance of your pressure regulator valve.
- Inspecció anual: Annually inspect the valve for any signs of leaks, corrosion, or external damage.
- Verificació de pressió: Periodically check the outlet pressure using a pressure gauge to ensure it remains at the desired setting. Fluctuations may indicate a need for adjustment or service.
- Neteja: L'exterior de la vàlvula es pot netejar amb anuncisamp cloth. Do not use harsh chemicals. Internal cleaning or servicing should only be performed by a qualified professional.
- Hivernització: In areas subject to freezing temperatures, ensure the valve and associated piping are adequately protected from freezing. Drain the system if it will be out of service for an extended period in freezing conditions.
Resolució de problemes
If you experience issues with your Watts LF26A pressure regulator valve, refer to the following common problems and solutions:
| Problema | Causa possible | Solució |
|---|---|---|
| No pressure reduction or high outlet pressure. | Valve set too high; debris in valve; worn internal components. | Adjust pressure setting counter-clockwise; flush system; consult professional for repair/replacement. |
| Low or fluctuating outlet pressure. | Valve set too low; insufficient inlet pressure; debris in valve; worn internal components. | Adjust pressure setting clockwise; check main water supply pressure; flush system; consult professional. |
| Water leaking from valve body or connections. | Loose connections; damaged threads; faulty seals/gaskets; cracked valve body. | Tighten connections; re-apply thread sealant; replace seals/gaskets; replace valve if cracked. |
| No water flow through valve. | Valve completely closed; significant debris blockage; incorrect installation (e.g., backward). | Check adjustment setting; flush system; verify flow arrow direction; consult professional. |
For issues not listed or if solutions do not resolve the problem, it is recommended to contact a qualified plumbing professional or Watts customer support.
Especificacions
| Atribut | Valor |
|---|---|
| Número de model | LF26A |
| Material del cos | Llautó sense plom |
| Mida d'entrada | 3/8 polzada |
| Mida de sortida | 3/8 polzada |
| Tipus de connexió | FIP (Female Iron Pipe) |
| Interval d'ajust de pressió | 1 a 25 psi |
| Pressió d'entrada màxima | 300 psi |
| Temperatura màxima | 140 °C (60 °F) |
| Dimensions del producte (L x A x A) | 2.3 x 2.3 x 5.1 polzades |
| Pes | 1 lliures |
| Aplicació | Aigua |
| Certificacions | Aprovat per la NSF |
| Fabricant | CAI - WATTS |
Garantia i Suport
Warranty information for the Watts LF26A Water Pressure Regulator Valve is typically provided with the product packaging or can be obtained directly from the manufacturer, Watts. Please refer to the official Watts weblloc web o poseu-vos en contacte amb el servei d'atenció al client per obtenir els termes i condicions detallats de la garantia.
Per obtenir assistència tècnica, peces de recanvi o més ajuda, poseu-vos en contacte amb el servei d'atenció al client de Watts o visiteu el seu servei oficial website. When contacting support, please have your product model number (LF26A) and purchase details readily available.
Watts Oficial Weblloc: www.watts.com





