Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: C (N.C., Float Type Auto Drain), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F)

Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: Standard, Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F)

Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: C (N.C., Float Type Auto Drain), Semi-Standard 1: 6C (w/Bowl Guard, Nylon Bowl), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F)

Body Size: 20, Thread: Rc, Port Size: 01 (1/8), Option: Standard, Semi-Standard 1: 6C (w/Bowl Guard, Nylon Bowl), Semi-Standard 2: Standard

Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: BC (B + C), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F)

Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: C (N.C., Float Type Auto Drain), Semi-Standard 1: 6C (w/Bowl Guard, Nylon Bowl), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F), Made to Order: X2141 (w/Element Service Indicator)

Body Size: 20, Thread: N (NPT), Port Size: 01 (1/8), Option: C (N.C., Float Type Auto Drain), Semi-Standard 1: C (Bowl Guard), Semi-Standard 2: Z (Name Plate, Caution Plate for Bowl, & Pressure Gauge in Imperial Units: psi, °F), Made to Order: X2141 (w/Element Service Indicator)

Body Size: 20, Thread: Rc, Port Size: 01 (1/8), Option: Standard, Semi-Standard 1: R (Flow Direction Right to Left), Semi-Standard 2: Standard

Stations: 01 (1 Station), Supply/Return Unit Layout: U (U Side: Open; D Side: Open), Thread Type: N (NPT), Supply Unit Components: Flow Adj. Valve: None; Stop Valve: None, Return Unit Flow Switch: 7 (Integrated Display), Return Unit Flow Range: 40 (5 to 40 L/min), Return Unit Components: W (w/Flow Adj.

Stations: 01 (1 Station), Piping: B (U Side: Open; D Side: Open), Thread Type: N (NPT), Flow Switch Type: 7 (Integrated Display), Rated Flow Range: 40 (5 to 40 L/min), Return Unit Components: Flow Adj.

Stations: 01 (1 Station), Piping: B (U Side: Open; D Side: Open), Thread Type: N (NPT), Flow Switch Type: 7 (Integrated Display), Rated Flow Range: 04 (0.5 to 4 L/min), Return Unit Components: S (w/Flow Adj.

Stations: 01 (1 Station), Piping: B (U Side: Open; D Side: Open), Thread Type: N (NPT), Flow Switch Type: 7 (Integrated Display), Rated Flow Range: 40 (5 to 40 L/min), Return Unit Components: S (w/Flow Adj.

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: A (C37, Seals: FKM, Class B), Suffix: Standard, Port Size: 01 (1/8), Thread: Rc, Voltage: 5 (24VDC), Electrical Entry: D (DIN Terminal), Surge Suppressor: S (w/Surge Voltage Suppressor), Rectifier: None (for DC or AC Class H Coil)

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: A (C37, Seals: FKM, Class B), Suffix: Standard, Port Size: 01 (1/8), Thread: N (NPT), Voltage: 3 (110VAC 50/60HZ), Electrical Entry: D (DIN Terminal), Surge Suppressor: Non, Rectifier: R (AC Class B Coil w/Full-wave Rectifier)

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: A (C37, Seals: FKM, Class B), Suffix: Standard, Port Size: 01 (1/8), Thread: N (NPT), Voltage: 5 (24VDC), Electrical Entry: C (Conduit), Surge Suppressor: Non, Rectifier: None (for DC or AC Class H Coil), Bracket: B (Bracket)

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: B (C37, Seals: EPDM, Class B), Suffix: Standard, Port Size: 01 (1/8), Thread: N (NPT), Voltage: 3 (110VAC 50/60HZ), Electrical Entry: D (DIN Terminal), Surge Suppressor: Non, Rectifier: R (AC Class B Coil w/Full-wave Rectifier)

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: B (C37, Seals: EPDM, Class B), Suffix: Standard, Port Size: 01 (1/8), Thread: N (NPT), Voltage: 5 (24VDC), Electrical Entry: G (Grommet), Surge Suppressor: Non, Rectifier: None (for DC or AC Class H Coil), Bracket: B (Bracket)

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: D (C37/CU, Seals: FKM, Class H), Suffix: Standard, Port Size: 01 (1/8), Thread: T (NPTF), Voltage: 3 (110VAC 50/60HZ), Electrical Entry: C (Conduit), Surge Suppressor: Non, Rectifier: None (for DC or AC Class H Coil)

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: H (Stainless Steel, Seals: FKM, Class B), Suffix: Z (Oil-free), Port Size: 01 (1/8), Thread: N (NPT), Voltage: 5 (24VDC), Electrical Entry: G (Grommet), Surge Suppressor: Non, Rectifier: None (for DC or AC Class H Coil), Bracket: B (Bracket)

Model: 31, Orifice: 2 (2.2mm), Style: 4 (COM, Single Unit), Option: J (Stainless Steel, Seals: EPDM, Class B), Suffix: Standard, Port Size: 01 (1/8), Thread: N (NPT), Voltage: 5 (24VDC), Electrical Entry: D (DIN Terminal), Surge Suppressor: Non, Rectifier: None (for DC or AC Class H Coil), Bracket: B (Bracket)