Irritrol (Richdel) 204MT 25mm Solenoid Valve with Manual Bleed

The Irritrol (Richdel) 204MT 25mm Solenoid Valve is a proven, long-lasting solution for residential and light-commercial irrigation systems. Trusted for almost 30 years, the 204MT Series delivers high flow capacity, low friction loss, and debris-tolerant performance—making it ideal for sites with lightly contaminated or dirty water. With its rugged construction and dependable operation, this valve remains one of the most reliable and installer-friendly options in the industry.

Featuring an improved bonnet design that interlocks with the diaphragm and valve base, the 204MT provides superior pressure stability and long-term sealing performance. The manual external bleed allows quick flushing and on-site system testing without running the controller, while the encapsulated 24VAC solenoid ensures consistent actuation under all operating conditions. Its corrosion- and UV-resistant PVC body, combined with a nylon-reinforced Buna-N diaphragm, ensures durability even in harsh outdoor or valve-box environments.

Easy to service without removing the valve from the system, the Irritrol 204MT offers straightforward maintenance and a long service life. With optional flow-control models available, the 204/205 Series provides flexibility across both new installations and retrofit irrigation designs. For reliability, simplicity, and proven field performance, the 204MT is an excellent choice for any 25mm zone valve.

FEATURES

• Rugged 25mm solenoid valve for residential & light-commercial systems
• Improved bonnet design interlocks with diaphragm for greater pressure balance
• Manual external bleed for flushing and manual activation
• Debris-tolerant design—suitable for lightly contaminated water
• High-flow, low-friction-loss internal design
• Heavy-duty, corrosion- & UV-resistant PVC
• Nylon-reinforced Buna-N diaphragm for long service life
• Encapsulated 24VAC solenoid
• Available in Female BSP
• Optional tamper-resistant flow control model (205MT)
• Easily serviced without removing valve from pipework

SPECIFICATIONS

• Hydraulic
  • Flow Range: 1–100 L/min
  • Pressure Range: 70–1034 kPa
• Electrical
  • Solenoid Voltage: 24 VAC
  • Inrush: 9.6 VA / 0.4 A
  • Holding: 4.8 VA / 0.2 A
  • Optional: 9–12 VDC latching solenoid (DCL)
• Dimensions (L × W × H)
  • 204MT: 130 × 70 × 120 mm
• Construction
  • Body & Bonnet: UV-resistant PVC
  • Diaphragm: Nylon-reinforced Buna-N
  • Hardware: Stainless steel
  • Seat Seal: Buna-N