💧 Check Valve, Rola-Chem, 3/8″ Barb x 3/8″ Barb, In-Line
Made by Rola Chem/Paradise Industries, manufacturer part number 521160.
📏 Specifications
| Specification | Value |
|---|---|
| Brand | Rola Chem/Paradise Industries |
| Manufacturer part number | 521160 |
| Plumbing Size | 3/8″ |
| Catalog description | Check Valve, Rola-Chem, 3/8″ Barb x 3/8″ Barb, In-Line |
Exploded parts diagram: This part is shown as item #31 on the Rola-Chem Pro Series Peristaltic Pump, RC252/25/53/103/503 exploded parts diagram.
🔧 Rola-Chem Pro Series Peristaltic Pump, RC252/25/53/103/503 – exploded parts diagram

The numbered parts below make up this assembly. Parts we stock are linked – click any to view.
| No. | Part |
|---|---|
| 39 | Injection Fitting, Rola-Chem, Plastic |
| 31 | Check Valve, Rola-Chem, 3/8" Barb x 3/8" Barb, In-Line ◀ this part |
| 30 | Check Valve, Rola-Chem, 3/8" Barb x 1/4"mpt, In-Line |
| 28 | Seal, Rola-Chem, Injection Fitting, Black |
| 27 | Injection Fitting, Rola-Chem, Brass |
| 26 | Retainer, Rola-Chem, Hose Weight |
| 25 | Hose Weight, Rola Chem Peristaltic Pump, Ceramic |
| 24 | 42-205-W001K24 |
| 23 | Hose Clamp, Rola-Chem, #6, Plastic |
| 22 | Barb Adapter, 3/8"b x 3/8"b |
| 21 | Hose Clamp, Rola-Chem, #8, Plastic |
| 19 | 42-205-W001K19 |
| 18 | 42-205-W001K18 |
| 17 | Rocker Switch, Rola-Chem RC25/53/103/503, SPDT |
| 15 | Timer, Rola-Chem RC25/53/103/503, Solid State, 115v |
| 13 | 42-205-W001K13 |
| 12 | H Block, Rola-Chem RC25, 2" |
| 11 | Wing Nut, Rola-Chem RC252, Nylon |
| 10 | 43-205-1125 |
| 8 | 43-205-1135 |
| 7 | Roller, Rola-Chem RC3, Tri-NS Assy, 3 Roller |
| 4 | Housing, Rola-Chem, Roller Housing, Blue, All Except RC252 |
🔧 Exploded diagram and parts
This part belongs to the Rola-Chem Pro Series Peristaltic Pump, RC252/25/53/103/503 assembly. Everything listed below is something we stock for it, and the numbers match the diagram.
| No. | Part | Our part number | Availability | Price | ||
|---|---|---|---|---|---|---|
| 7 | ![]() |
Roller, Rola-Chem RC3, Tri-NS Assy, 3 Roller | 523400 | 6 in stock | $98.33 | Add to cart |
| 11 | ![]() |
Wing Nut, Rola-Chem RC252, Nylon | 525140 | 5 in stock | $0.93 | Add to cart |
| 15 | ![]() |
Timer, Rola-Chem RC25/53/103/503, Solid State, 115v | 524065 | Available to order | $119.64 | |
| 21 | ![]() |
Hose Clamp, Rola-Chem, #8, Plastic | 525114 | 69 in stock | $1.91 | Add to cart |
| 22 | ![]() |
Barb Adapter, 3/8"b x 3/8"b | 520111 | 42 in stock | $2.27 | Add to cart |
| 23 | ![]() |
Hose Clamp, Rola-Chem, #6, Plastic | 520110 | 26 in stock | $1.92 | Add to cart |
| 25 | ![]() |
Hose Weight, Rola Chem Peristaltic Pump, Ceramic | 523110 | 12 in stock | $9.32 | Add to cart |
| 26 | ![]() |
Retainer, Rola-Chem, Hose Weight | 520112 | 13 in stock | $1.89 | Add to cart |
| 27 | ![]() |
Injection Fitting, Rola-Chem, Brass | 527158 | 16 in stock | $30.45 | Add to cart |
| 28 | ![]() |
Seal, Rola-Chem, Injection Fitting, Black | 525113 | 10 in stock | $1.91 | Add to cart |
| 30 | ![]() |
Check Valve, Rola-Chem, 3/8" Barb x 1/4"mpt, In-Line | 521170 | 20 in stock | $49.54 | Add to cart |
| 39 | ![]() |
Injection Fitting, Rola-Chem, Plastic | 527159 | 1 in stock | $29.54 | Add to cart |
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