PEM 500 Series Directional Swivel Unions are used to align those jets and nozzles, that do not have a swivel base incorporated and require directional adjustment beyond 5o to maximum 15o off center line. For lesser directional adjustment use PEM 08 Series Adjustment Flanges.
PEM 531 - 535 are made of brass, PEM 536 - 541 are made of brass and bronze, while all larger ones are made of cast bronze. All bolts are of stainless steel.
| Product # | Male x Female (In. x In.) | Overall Height (In.) | Approximate added height to riser (In.) |
| 507-2160 | 1/2 x 1/2 | 2.7 | 1.66 |
| 507-2710 | 1/2 x 3/4 | 2.8 | 1.7 |
| 507-2180 | 3/4 x 3/4 | 3 | 1.89 |
| 507-2190 | 1/2 x 1 | 3 | 1.78 |
| 507-2200 | 3/4 x 1 | 3.2 | 1.89 |
| 507-2210 | 1 x 1 | 3.4 | 1.92 |
| 507-2220 | 1 x 1-1/4 | 3.8 | 2.37 |
| 507-2230 | 1-1/4 x 1-1/4 | 4.2 | 2.72 |
| 507-2240 | 1-1/4 x 1-1/2 | 4.6 | 3.12 |
| 507-2250 | 1-1/2 x 1-1/2 | 4.8 | 3.31 |
| 507-2260 | 1-1/2 x 2 | 5.4 | 3.86 |
| 507-2270 | 2 x 2 | 5.7 | 4.22 |
| 507-2280 | 2-1/2 x 3 | 7.1 | 5.08 |
| 507-2290 | 3 x 3 | 7.3 | 5.42 |
| 507-2300 | 4 x 4 | 8.7 | 6.38 |